Brain Electrical Activity

Improve Brain Processing of Errors with Mindfulness

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Improve Brain Processing of Errors with Mindfulness

 

By John M. de Castro, Ph.D.

 

“meditation physically impacts the extraordinarily complex organ between our ears. Recent scientific evidence confirms that meditation nurtures the parts of the brain that contribute to well-being. Furthermore, it seems that a regular practice deprives the stress and anxiety-related parts of the brain of their nourishment.” – Mindworks

 

Mindfulness training has been shown to improve health and well-being. It has also been found to be effective for a large array of medical and psychiatric conditions, either stand-alone or in combination with more traditional therapies. As a result, mindfulness training has been called the third wave of therapies. Mindfulness training produces changes in the brain’s electrical activity. This can be measured by recording the electroencephalogram (EEG). The brain produces rhythmic electrical activity that can be recorded from the scalp.

 

One method to indirectly observe information processing in the brain is to measure the changes in the electrical activity that occur in response to specific stimuli. These are called event-related potentials or ERPs. The signal following a stimulus changes over time. The fluctuations of the signal after specific periods of time are thought to measure different aspects of the nervous system’s processing of the stimulus. Error related negativity is a negative going change in the EEG that occurs about a tenth of a second after committing an error in a lab task. This is followed 2 to 4 tenths of a second after error commission by a positive going change in the EEG called the error positivity. Using these parameters in the EEG, the ability of mindfulness meditation training to affect error monitoring can be investigated.

 

In today’s Research News article “On Variation in Mindfulness Training: A Multimodal Study of Brief Open Monitoring Meditation on Error Monitoring.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6770246/), Lin and colleagues recruited meditation naïve, healthy, right handed, female undergraduate students and randomly assigned them to a meditation or control group. Meditation consisted in a recorded 20 minute guided open monitoring meditation while the control condition consisted of an 18 minute TED talk. After they performed an arrow flanker task where the participant had to respond to an arrow stimulus and ignore irrelevant but distracting material. During the task the electroencephalogram (EEG) was recorded and the brain’s electrical responses to the arrow flanker task stimuli recorded (event-related potentials, ERP).

 

The groups did not differ in mindfulness or accuracy or reaction times in the flanker task. With the event-related potentials (ERP) they found that on trials where there was an error committed the meditation group had a significantly larger error positivity response. Surprisingly, and contrary to expectations, there were no group differences in error related negativity in the ERP.

 

The results suggest that brief open monitoring meditation in meditation naïve young women does not affect their ability to attend to a task and ignore distractions, but it does alter the electrical response of the brain to attentional errors committed. Error positivity has been linked to awareness of the errors and cognitive adjustments resulting from the errors. Hence, brief open monitoring meditation appears to improve awareness of error commission and perhaps future adjustments.

 

It should be noted that a one-time 20-minute guided meditation may not be sufficient to produce major changes in neural processing. Indeed, meditation practice has been found to improve attentional ability. So, there is a need to investigate error monitoring and detection and the brain’s responses after longer-term meditation practice in both men and women of a wider range of ages.

 

So, improve brain processing of errors with mindfulness.

 

“brain imaging techniques are revealing that this ancient practice can profoundly change the way different regions of the brain communicate with each other – and therefore how we think – permanently.” – Tom Ireland

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Lin, Y., Eckerle, W. D., Peng, L. W., & Moser, J. S. (2019). On Variation in Mindfulness Training: A Multimodal Study of Brief Open Monitoring Meditation on Error Monitoring. Brain sciences, 9(9), 226. doi:10.3390/brainsci9090226

 

Abstract

A nascent line of research aimed at elucidating the neurocognitive mechanisms of mindfulness has consistently identified a relationship between mindfulness and error monitoring. However, the exact nature of this relationship is unclear, with studies reporting divergent outcomes. The current study sought to clarify the ambiguity by addressing issues related to construct heterogeneity and technical variation in mindfulness training. Specifically, we examined the effects of a brief open monitoring (OM) meditation on neural (error-related negativity (ERN) and error positivity (Pe)) and behavioral indices of error monitoring in one of the largest novice non-meditating samples to date (N = 212). Results revealed that the OM meditation enhanced Pe amplitude relative to active controls but did not modulate the ERN or behavioral performance. Moreover, exploratory analyses yielded no relationships between trait mindfulness and the ERN or Pe across either group. Broadly, our findings suggest that technical variation in scope and object of awareness during mindfulness training may differentially modulate the ERN and Pe. Conceptual and methodological implications pertaining to the operationalization of mindfulness and its training are discussed.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6770246/

Mindfulness Reduces Addiction by Improving Pleasure Appreciation in Opioid Users

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Mindfulness Reduces Addiction by Improving Pleasure Appreciation in Opioid Users

 

By John M. de Castro, Ph.D.

 

“mindfulness-based interventions could help people dependent on opioids increase their self-awareness and self-control over cravings and be less reactive to emotional and physical pain. Individuals with an opioid addiction could also be taught to change their negative thoughts and savor pleasant events, which may help them to regulate their emotions and experience more enjoyment.” – Science News

 

Substance abuse and addiction is a terrible problem, especially opioid pain relievers. Opioid addiction has become epidemic and is rapidly increasing affecting more than 2 million Americans and an estimated 15 million people worldwide. In the U.S more than 20,000 deaths yearly were attributed to an overdose of prescription opioids, and another 13,000 deaths from heroin overdose. These statistics, although startling are only the tip of the iceberg. Drug use is associated with suicide, homicide, motor-vehicle injury, HIV infection, pneumonia, violence, mental illness, and hepatitis. It can render the individual ineffective at work, it tears apart families, it makes the individual dangerous both driving and not.

 

An effective treatment for addiction has been elusive. Most programs and therapies to treat addictions have poor success rates. Recent research is indicating that mindfulness has been found to be effective in treating addictions. Mindfulness-Oriented Recovery Enhancement (MORE) was specifically developed to employ mindfulness training along with other proven methods to assist addicts in remaining off of drugs. MORE involves mindful breathing and body scan meditations, cognitive reappraisal to decrease negative emotions and craving, and savoring to augment natural reward processing and positive emotion.

 

One method to observe reward processing in the brain is to measure the changes in the electrical activity that occur in response to specific reward related stimuli. These are called event-related potentials or ERPs. The signal following a stimulus changes over time. The fluctuations of the signal after specific periods of time are thought to measure different aspects of the nervous system’s processing of the stimulus. The Late Positive Potential (LPP) response in the evoked potential (ERP) is a positive going electrical response occurring between a 4 to 8 tenths of a second following the target stimulus presentation. The LPP is thought to reflect attention to the emotional features of a stimulus.

 

In today’s Research News article “Mindfulness-Oriented Recovery Enhancement remediates hedonic dysregulation in opioid users: Neural and affective evidence of target engagement.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6795512/), Garland and colleagues recruited chronic pain patients who were opioid users. They were randomly assigned to receive 8 weeks of either Mindfulness-Oriented Recovery Enhancement (MORE) or a therapist led support group. They were measured for brain activity with an electroencephalogram (EEG) before and after treatment and opioid use at 3-month follow-up. In one experiment they measure the EEG response (Late Positive Potential (LPP)) while being presented with opioid cues (pictures of pills and pill bottles) or a neutral picture either normally or while attempting to not react or judge the stimuli. In a separate experiment with a similar procedure except that the participants were presented with natural reward pictures (e.g., social affiliation, natural beauty, and athletic victories) or neutral pictures.

 

They found that before treatment opioid and natural reward stimuli reliably produced significantly larger Late Positive Potentials (LPP) indicating that the LPP reflected emotional responses to rewards. After treatment the group that received Mindfulness-Oriented Recovery Enhancement (MORE) had significantly smaller LPP responses to opioid related cues than the support group. When the participants were asked to not react or judge the stimuli the MORE group had significantly greater reductions in the LPP. Importantly, the participants in the MORE group had a significantly larger LPPs to natural reward stimuli and when the participants were asked to not react or judge the natural reward stimuli the MORE group had a significantly larger increases in the LPP.

 

They also investigated the subjective emotional responses of the participants to the opioid and natural reward stimuli and found that after Mindfulness-Oriented Recovery Enhancement (MORE) the participants had larger increases in response to natural reward stimuli and smaller responses to opioid related stimuli. At the 3 month follow-up they found that MORE reduced the use of opioids to a greater extent than the support group and that it did so directly and also indirectly by increasing natural reward responses which, in turn, reduced opioid use.

 

These results suggest that responses to the rewarding aspects of stimuli is important in opioid addiction and that Mindfulness-Oriented Recovery Enhancement (MORE) reduces opioid use in addicted individuals they demonstrate that MORE reduces emotional responses to opioid cues while amplifying responses to natural rewards. This suggests that mindfulness treatment reduces opioid use by altering the addict’s responses to stimuli related to the addiction and naturally rewarding stimuli; amplifying natural reward while suppressing opioid rewards. This makes opioids less rewarding and natural stimuli more rewarding.

 

So, mindfulness reduces addiction by altering pleasure appreciation in opioid users.

 

“Mindfulness-Oriented Recovery Enhancement (MORE), increases the brain’s response to natural, healthy rewards while also decreasing the brain’s response to opioid-related cues.” – University of Utah

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Garland, E. L., Atchley, R. M., Hanley, A. W., Zubieta, J. K., & Froeliger, B. (2019). Mindfulness-Oriented Recovery Enhancement remediates hedonic dysregulation in opioid users: Neural and affective evidence of target engagement. Science advances, 5(10), eaax1569. doi:10.1126/sciadv.aax1569

 

Abstract

Addiction neuroscience models posit that recurrent drug use increases reactivity to drug-related cues and blunts responsiveness to natural rewards, propelling a cycle of hedonic dysregulation that drives addictive behavior. Here, we assessed whether a cognitive intervention for addiction, Mindfulness-Oriented Recovery Enhancement (MORE), could restructure reward responsiveness from valuation of drug-related reward back to valuation of natural reward. Before and after 8 weeks of MORE or a support group control, prescription opioid users (N = 135) viewed opioid and natural reward cues while an electroencephalogram biomarker of target engagement was assessed. MORE was associated with decreased opioid cue-reactivity and enhanced capacity to regulate responses to opioid and natural reward cues. Increased positive affective responses to natural reward cues were associated with decreased craving and mediated MORE’s therapeutic effects on opioid misuse. This series of randomized experiments provide the first neurophysiological evidence that an integrative behavioral treatment can remediate hedonic dysregulation among chronic opioid users.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6795512/

 

Reduce the Complexity of Brain Activity with Meditation

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Reduce the Complexity of Brain Activity with Meditation

 

By John M. de Castro, Ph.D.

 

“intensive and continued meditation practice is associated with enduring improvements in sustained attention.” – Anthony Zanesco

 

There has accumulated a large amount of research demonstrating that meditation practice has significant benefits for psychological, physical, and spiritual wellbeing. One way that meditation practices may produce these benefits is by altering the brain. The nervous system is a dynamic entity, constantly changing and adapting to the environment. It will change size, activity, and connectivity in response to experience. These changes in the brain are called neuroplasticity. Over the last decade neuroscience has been studying the effects of contemplative practices on the brain and has identified neuroplastic changes in widespread areas. In other words, meditation practice appears to mold and change the brain, producing psychological, physical, and spiritual benefits.

 

It is important to understand what are the exact changes in the brain that are produced by meditation. Studies of changes in brain activity with meditation suggest that meditators have more complicated information processing going on in their nervous systems at rest but during meditation greatly simplify that activity. But there are, a wide variety of meditation techniques that may have different consequences for brain changes. One category of these techniques is focused attention meditation, where the individual practices paying attention to a single meditation object, learns to filter out distracting stimuli, including thoughts, and learns to stay focused on the present moment, filtering out thoughts centered around the past or future.

 

In today’s Research News article “Controlling the Temporal Structure of Brain Oscillations by Focused Attention Meditation.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6585826/), Irrmischer and colleagues examine the changes in brain activity with focused meditation. They recruited experienced meditators (> 5 years of experience) and meditation naïve control participants. They measured their brain activity with an Electroencephalogram (EEG) after eye closed rest and after 5 minutes of focused meditation. In a second study they recruited experienced meditators and healthy control participants. They again measured their brain activity with an Electroencephalogram (EEG) during and after eye closed rest and during and after 5 minutes of focused meditation.

 

In study 1, compared to after a rest condition, after focused meditation there were significant changes in cognitive content with a reduction in theory of mind, planning, sleepiness, verbal thought, health concerns, and discontinuity of mind, and increase in somatic awareness. Also, in comparison to baseline and the control participants, during focused meditation there was a reduction in the complexity of the brain activity with a reduction in long-range temporal correlations across every frequency band and across brain areas. These differences in the EEG were confirmed in study 2 and they found that after 1 year of meditation training there was a further significant reduction in the complexity of brain activity with a reduction in long-range temporal correlations. These differences were also present after eyes closed rest without meditation suggesting that there was an overall reduction in neural activity complexity.

 

These results are interesting and suggest that meditation changes the brain over time to produce less complexity in brain activity. This is similar to previous findings using a different analytic technique that meditation reduces the complexity of neural processing. It is not known but this decrease in complexity of brain activity may be reflective of the ability of meditation practice to increase attention and decrease mind wandering. Greater focus with less distraction would reduce the complexity of brain activity. This would make the brain more efficient and better able to carry out its important cognitive functions. These cognitive changes were reflected in the cognitive contents after meditation.

 

So, reduce the complexity of brain activity with meditation.

 

“bringing attention back to the breath each time you feel your mind wandering during meditation helps strengthen the brain’s neural circuitry for focus.” – Nicole Bayes-Fleming

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Irrmischer, M., Houtman, S. J., Mansvelder, H. D., Tremmel, M., Ott, U., & Linkenkaer-Hansen, K. (2018). Controlling the Temporal Structure of Brain Oscillations by Focused Attention Meditation. Human brain mapping, 39(4), 1825–1838. doi:10.1002/hbm.23971

 

Abstract

Our focus of attention naturally fluctuates between different sources of information even when we desire to focus on a single object. Focused attention (FA) meditation is associated with greater control over this process, yet the neuronal mechanisms underlying this ability are not entirely understood. Here, we hypothesize that the capacity of attention to transiently focus and swiftly change relates to the critical dynamics emerging when neuronal systems balance at a point of instability between order and disorder. In FA meditation, however, the ability to stay focused is trained, which may be associated with a more homogeneous brain state. To test this hypothesis, we applied analytical tools from criticality theory to EEG in meditation practitioners and meditation‐naïve participants from two independent labs. We show that in practitioners—but not in controls—FA meditation strongly suppressed long‐range temporal correlations (LRTC) of neuronal oscillations relative to eyes‐closed rest with remarkable consistency across frequency bands and scalp locations. The ability to reduce LRTC during meditation increased after one year of additional training and was associated with the subjective experience of fully engaging one’s attentional resources, also known as absorption. Sustained practice also affected normal waking brain dynamics as reflected in increased LRTC during an eyes‐closed rest state, indicating that brain dynamics are altered beyond the meditative state. Taken together, our findings suggest that the framework of critical brain dynamics is promising for understanding neuronal mechanisms of meditative states and, specifically, we have identified a clear electrophysiological correlate of the FA meditation state.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6585826/

 

Improve Episodic Memory and Alter Brain Activity during Memory Retrieval with Mindfulness

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Improve Episodic Memory and Alter Brain Activity during Memory Retrieval with Mindfulness

 

By John M. de Castro, Ph.D.

 

“A critical part of attention (and working memory capacity) is being able to ignore distraction. There has been growing evidence that meditation training (in particular mindfulness meditation) helps develop attentional control, and that this can start to happen very quickly.” – About Memory

 

There has accumulated a large amount of research demonstrating that mindfulness has significant benefits for psychological, physical, and spiritual wellbeing. One way that mindfulness practices may produce these benefits is by altering the brain. The nervous system is a dynamic entity, constantly changing and adapting to the environment. It will change size, activity, and connectivity in response to experience. These changes in the brain are called neuroplasticity. Over the last decade neuroscience has been studying the effects of contemplative practices on the brain and has identified neuroplastic changes in widespread areas. In other words, mindfulness practice appears to mold and change the brain, producing psychological, physical, and spiritual benefits.

 

One way to observe the effects of meditation techniques is to measure the effects of each technique on the brain’s activity. This can be done by recording the electroencephalogram (EEG). The brain produces rhythmic electrical activity that can be recorded from the scalp. It is usually separated into frequency bands. Delta activity consists of oscillations in the 0.5-3 cycles per second band. Theta activity in the EEG consists of oscillations in the 4-8 cycles per second band. Alpha activity consists of oscillations in the 8-12 cycles per second band. Beta activity consists of oscillations in the 13-30 cycles per second band while Gamma activity occurs in the 30-100 cycles per second band.

 

In today’s Research News article “Increases in Theta Oscillatory Activity During Episodic Memory Retrieval Following Mindfulness Meditation Training.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6738165/), Nyhus and colleagues recruited adult participants and randomly assigned them to a wait-list control condition or to receive 4-weeks of once a week for 1 hour of mindfulness meditation training along with 20 minutes of daily home practice. They were measured for episodic memory and mindfulness before and after training. They learned words either by imagining a place associated with them or rating their pleasantness. The electroencephalogram (EEG) was measured from the scalp as the participants were engaged in an episodic memory task.

 

They found that meditation training produced a significant increase in mindfulness, especially the observe, describe, and act with awareness facets. The meditation group were also significantly better at identifying the source (place or pleasantness) of the word in the episodic memory task. With the EEG they found that the meditation group after training had significant increases in power in the Theta frequency band (4-7.5 hz.) in the frontal and parietal cortical areas of the brain. The increase in theta power were correlated with the level of the describe facet of mindfulness.

 

Theta power has been previously found to increase during tasks that test episodic memory. That was true here also. But in the present study the increases in theta power were greater after mindfulness meditation training. This suggests that the training altered the nervous system making it more responsive to episodic memories. The fact that mindfulness has been found to improve memory and that source memory was improved in the present study would appear to support this assertion. Hence, it would appear that mindfulness meditation improves episodic memory by enhancing brain processing of memories.

 

So, improve episodic memory and alter brain activity during memory retrieval with mindfulness.

 

“The meditation-and-the-brain research has been rolling in steadily for a number of years now, . . . . The practice appears to have an amazing variety of neurological benefits – from changes in grey matter volume to reduced activity in the “me” centers of the brain to enhanced connectivity between brain regions.” – Alice Walton

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Nyhus, E., Engel, W. A., Pitfield, T. D., & Vakkur, I. (2019). Increases in Theta Oscillatory Activity During Episodic Memory Retrieval Following Mindfulness Meditation Training. Frontiers in human neuroscience, 13, 311. doi:10.3389/fnhum.2019.00311

 

Abstract

Mindfulness meditation has been shown to improve episodic memory and increase theta oscillations which are known to play a role in episodic memory retrieval. The present study examined the effect of mindfulness meditation on episodic memory retrieval and theta oscillations. Using a longitudinal design, subjects in the mindfulness meditation experimental group who underwent 4 weeks of mindfulness meditation training and practice were compared to a waitlist control group. During the pre-training and post-training experimental sessions, subjects completed the Five Facet Mindfulness Questionnaire (FFMQ) and studied adjectives and either imagined a scene (Place Task) or judged its pleasantness (Pleasant Task). During the recognition test, subjects decided which task was performed with each word (“Old Place Task” or “Old Pleasant Task”) or “New.” FFMQ scores and source discrimination were greater post-training than pre-training in the mindfulness meditation experimental group. Electroencephalography (EEG) results revealed that for the mindfulness meditation experimental group theta power was greater post-training than pre-training in right frontal and left parietal channels and changes in FFMQ scores correlated with changes in theta oscillations in right frontal channels (n = 20). The present results suggest that mindfulness meditation increases source memory retrieval and theta oscillations in a fronto-parietal network.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6738165/

 

Change the Brain’s Electrical Activity to during Sleep and Wakefulness with Meditation

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Change the Brain’s Electrical Activity to during Sleep and Wakefulness with Meditation

 

By John M. de Castro, Ph.D.

 

“Soon after beginning a meditation practice, many people report needing less sleep.” – Eoc Institute

 

We spend about a third of our lives in sleep, but we know very little about it. It is known that sleep is not a unitary phenomenon. Rather, it involves several different states that can be characterized by differences in physiological activation, neural activity, and subjective experiences. In the waking state the nervous system shows EEG activity that is termed low voltage fast activity. The electrical activity recorded from the scalp is rapidly changing but only with very small size waves. When sleep first occurs, the individual enters into a stage called slow-wave sleep, sometimes called non-REM sleep. The heart rate and blood pressure decline even further and the muscles become very soft and relaxed. In this state the EEG shows a characteristic waveform known as the theta rhythm, which is a large change in voltage recorded that oscillates at a rate of 4 to 8 cycles per second. As the individual goes even deeper into sleep something remarkable happens as the individual enters into rapid eye movement sleep (REM sleep). Here the muscles become extremely inhibited and flaccid, but the eyes move rapidly under the closed eyelids as if the individual was looking around. At the same time the heart rate and blood pressure increase and become very variable and sometimes very high.

 

It has been shown that mindfulness training, including meditation practice, affects sleep and tends to improve sleep and reduce insomnia. But there is need to further investigate the effects of meditation practice, particularly long-term meditation practice, on brain activity during sleep and wakefulness to begin to understand the mechanisms by which meditation practice affects sleep and wakefulness.

 

In today’s Research News article “Acute effects of meditation training on the waking and sleeping brain: Is it all about homeostasis?” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6534352/), Dentico and colleagues recruited long-term meditators (at least 3-years of experience) and a group of age and gender matched non-meditators. They had their overnight electroencephalograms (EEG) recorded during sleep and after waking in the lab under three conditions, baseline, after a day of intensive focused meditation, and after a day of intensive loving kindness meditation. The meditation simulated a meditation retreat format for 2 days. The non-meditators rested during similar periods. They were also measured for depression, mental health issues, sleep disorders, insomnia, fatigue, sleepiness, and common phenomenological features of meditation.

 

They found that the sleep and waking EEGs were not different between the two types of meditation, focused or loving kindness. After intensive meditation practice there were significant increases after sleep in waking slow (8 hz.) and fast (15 hz.) waves in the EEG recorded from the prefrontal and parietal cortical regions. They also reported that the greater the amount of previous meditation experience the greater the waking high frequency waveforms after a day of intensive meditation. They also found that the EEG activities in in the theta frequency range (4-8 hz.) in different brain regions were highly related during non-REM sleep in long-term meditators.

 

These results are interesting and suggest that long-term meditation changes the brains activity during both sleep and wakefulness. The regions most affected, the prefrontal and parietal cortical regions, are associated with attentional processes. So, the results suggest that long-term meditation changes the brain to improve its ability to focus attention. They also suggest that long-term meditation increases the synchronization in different brain regions of activity during non-REM sleep. This may signal deeper levels of sleep. Regardless, the results suggest that meditation experience changes the brain’s activity in sleep and wakefulness.

 

So, change the brain’s electrical activity to during sleep and wakefulness with meditation.

 

“meditation has lasting effects on the plastic brain, and that gamma activity during non-REM sleep may be a reliable marker for the extent of these changes.” – Plastic Brain

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Dentico D, Bachhuber D, Riedner BA, Ferrarelli F, Tononi G, Davidson RJ, Lutz A. Acute effects of meditation training on the waking and sleeping brain: Is it all about homeostasis? Eur J Neurosci. 2018 Sep;48(6):2310-2321. doi: 10.1111/ejn.14131. PMID: 30144201; PMCID: PMC6534352.

 

Abstract

Our recent finding of a meditation-related increase in low-frequency NREM sleep EEG oscillatory activities peaking in the theta-alpha range (4–12 Hz) was not predicted. From a consolidated body of research on sleep homeostasis, we would expect a change peaking in slow wave activity (1–4 Hz) following an intense meditation session. Here we compared these changes in sleep with the post-meditation changes in waking rest scalp power to further characterize their functional significance. High-density EEG recordings were acquired from 27 long-term meditators (LTM) on three separate days at baseline and following two 8-hr sessions of either mindfulness or compassion-and-loving-kindness meditation. Thirty-one meditation-naïve participants (MNP) were recorded at the same time points. As a common effect of meditation practice, we found increases in low and fast waking EEG oscillations for LTM only, peaking at eight and 15 Hz respectively, over prefrontal, and left centro-parietal electrodes. Paralleling our previous findings in sleep, there was no significant difference between meditation styles in LTM as well as no difference between matched sessions in MNP. Meditation-related changes in wakefulness and NREM sleep were correlated across space and frequency. A significant correlation was found in the EEG low frequencies (<12 Hz). Since the peak of coupling was observed in the theta-alpha oscillatory range, sleep homeostatic response to meditation practice is not sufficient to explain our findings. Another likely phenomenon into play is a reverberation of meditation-related processes during subsequent sleep. Future studies should ascertain the interplay between these processes in promoting the beneficial effects of meditation practice.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6534352/

 

Less Complex Brain Activity Characterizes Meditation by Experienced Meditators.

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Less Complex Brain Activity Characterizes Meditation by Experienced Meditators.

 

By John M. de Castro, Ph.D.

 

“Using modern technology like fMRI scans, scientists have developed a more thorough understanding of what’s taking place in our brains when we meditate. The overall difference is that our brains stop processing information as actively as they normally would.” – Belle Beth Cooper

 

There has accumulated a large amount of research demonstrating that meditation practice has significant benefits for psychological, physical, and spiritual wellbeing. One way that meditation practices may produce these benefits is by altering the brain. The nervous system is a dynamic entity, constantly changing and adapting to the environment. It will change size, activity, and connectivity in response to experience. These changes in the brain are called neuroplasticity. Over the last decade neuroscience has been studying the effects of contemplative practices on the brain and has identified neuroplastic changes in widespread areas. In other words, meditation practice appears to mold and change the brain, producing psychological, physical, and spiritual benefits.

 

It is important to understand what are the exact changes in the brain that are produced by meditation. In today’s Research News article “Characterizing the Dynamical Complexity Underlying Meditation.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6637306/), Escrichs and colleagues recruited experienced adult meditators with at least 1000 hours of meditation experience and an ongoing practice and a matched group of non-meditators. They underwent functional Magnetic Resonance Imaging (fMRI) at rest and again when performing breath focused meditation. The scans were then analyzed with Intrinsic Ignition Framework that measures the degree of elicited whole-brain integration of spontaneously occurring events across time, in other words the complexity of information processing going on in the nervous system.

 

They found that at rest, the meditators had higher Intrinsic-Driven Mean Integration (IDMI) than controls but during meditation they had significantly lower IDMI than the controls. The meditators also had significantly higher metastability during rest than controls but that metastability significantly declined during meditation. These results are complex but indicate that meditators have greater levels of information moving around the brain and greater complexity of information processing over time at rest but during meditation move to a state where there is less information moving around and less complexity of processing.

 

The results suggest that meditators have more complicated information processing going on in their nervous systems at rest but during meditation greatly simplify that activity. It would appear that this takes practice as the non-meditators did not have comparable activities during meditation. This suggests that meditation experience over time produces neuroplastic alterations of the brain that increase the ability of the brain to process information normally and to become quieter during meditation.

 

“Nondirective meditation yields more marked changes in electrical brain wave activity associated with wakeful, relaxed attention, than just resting without any specific mental technique.” – ScienceDaily

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Escrichs, A., Sanjuán, A., Atasoy, S., López-González, A., Garrido, C., Càmara, E., & Deco, G. (2019). Characterizing the Dynamical Complexity Underlying Meditation. Frontiers in systems neuroscience, 13, 27. doi:10.3389/fnsys.2019.00027

 

Abstract

Over the past 2,500 years, contemplative traditions have explored the nature of the mind using meditation. More recently, neuroimaging research on meditation has revealed differences in brain function and structure in meditators. Nevertheless, the underlying neural mechanisms are still unclear. In order to understand how meditation shapes global activity through the brain, we investigated the spatiotemporal dynamics across the whole-brain functional network using the Intrinsic Ignition Framework. Recent neuroimaging studies have demonstrated that different states of consciousness differ in their underlying dynamical complexity, i.e., how the broadness of communication is elicited and distributed through the brain over time and space. In this work, controls and experienced meditators were scanned using functional magnetic resonance imaging (fMRI) during resting-state and meditation (focused attention on breathing). Our results evidenced that the dynamical complexity underlying meditation shows less complexity than during resting-state in the meditator group but not in the control group. Furthermore, we report that during resting-state, the brain activity of experienced meditators showed higher metastability (i.e., a wider dynamical regime over time) than the one observed in the control group. Overall, these results indicate that the meditation state operates in a different dynamical regime compared to the resting-state.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6637306/

 

Meditation Alters the Brains of Patients with Residual Symptoms after Accidental Physical Injury

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Meditation Alters the Brains of Patients with Residual Symptoms after Accidental Physical Injury

 

By John M. de Castro, Ph.D.

 

“Mindfulness meditation can help you recover from injury by changing your perception of the circumstance/trauma/event. . . . You can come to know if pain is authentic or based on fear. You can take an honest look at how much you are building up the meaning of an injury and causing yourself more pain. You can direct your mind towards what is important, rather than being distracted by irrational worries and beliefs that are based in fiction or illusion.” – Jennifer Houghton

 

Accidental or unintentional injuries occur due to external forces. In the United States there are nearly 40 million visits to doctors’ offices and 30 million emergency room visits for accidental injuries. The most frequent causes are automobile accidents and falls. Often patients have physical and mental distress that continues even with medical treatment for a year or more. These are termed post-traumatic residual disabilities. They are obviously a major problem for the ability of the patients to conduct their lives.

 

Meditation training has been found to be an effective treatment for a myriad of physical and mental problems resulting from accident, disease, or post-traumatic stress. It has also been established that meditation practice alters brain structure and electrical activity. So, it would make sense to employ meditation training for patients with post-traumatic residual disabilities and examine brain activity after the training.

 

In today’s Research News article “Short-term meditation modulates EEG activity in subjects with post-traumatic residual disabilities.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6402287/), Hata and colleagues recruited adult patients with physical and mental distress that continued even with medical treatment for a year or more and a group of healthy normal control participants. The participants with post-traumatic residual disabilities were provided audio recording led meditation practice and asked to meditate for 24 minutes daily for 8 weeks. Before and after practice they were measured for distress from disability and mindfulness and were subjected to an Electroencephalographic (EEG) technique called Low Resolution Electromagnetic Tomography (eLORETA) while at rest and while meditating. Recordings were only performed once for the normal control participants who did not meditate.

 

The meditation practice produced a significant increase in mindfulness in the patients. In comparison to the normal controls, meditation produced increased current densities in the inferior parietal module of the participants with post-traumatic residual disabilities. They also found that changes in the brain current densities in the precuneus were positively associated with work or daily difficulties resulting from the injury.

 

This study demonstrated that meditation practice produces changes in the electrical characteristic in the brains of patients with post-traumatic residual disabilities. Importantly, the greater the increase in precuneus current density the greater the improvement in daily physical difficulties resulting from the injuries. So, meditation practice may be useful for the relief of these difficulties. But the effects were not large and there wasn’t a comparable control condition. So, these results must be seen as tentative until a larger randomized controlled trial can be implemented.

 

So, meditation alters the brains of patients with residual symptoms after accidental physical injury.

 

“meditation is about establishing a different relationship with your thoughts and affirming your body’s ability to heal itself. You’re training yourself to place your attention where and when you want. This is very powerful. It gives you the ability to direct your thoughts (and mood) in more productive and peaceful directions. This ability has profound self-healing implications for physical and mental health.” – Caroline Jordan

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Hata, M., Hayashi, N., Ishii, R., Canuet, L., Pascual-Marqui, R. D., Aoki, Y., … Ito, T. (2019). Short-term meditation modulates EEG activity in subjects with post-traumatic residual disabilities. Clinical neurophysiology practice, 4, 30–36. doi:10.1016/j.cnp.2019.01.003

 

Abstract

Objective

Neurophysiological changes related to meditation have recently attracted scientific attention. We aimed to detect changes in electroencephalography (EEG) parameters induced by a meditative intervention in subjects with post-traumatic residual disability (PTRD), which has been confirmed for effectiveness and safety in a previous study. This will allow us to estimate the objective effect of this intervention at the neurophysiological level.

Methods

Ten subjects with PTRD were recruited and underwent psychological assessment and EEG recordings before and after the meditative intervention. Furthermore, 10 additional subjects were recruited as normal controls. Source current density as an EEG parameter was estimated by exact Low Resolution Electromagnetic Tomography (eLORETA). Comparisons of source current density in PTRD subjects after the meditative intervention with normal controls were investigated. Additionally, we compared source current density in PTRD subjects between before and after meditative intervention. Correlations between psychological assessments and source current density were also explored.

Results

After meditative intervention, PTRD subjects exhibited increased gamma activity in the left inferior parietal lobule relative to normal controls. In addition, changes of delta activity in the right precuneus correlated with changes in the psychological score on role physical item, one of the quality of life scales reflecting the work or daily difficulty due to physical problems.

Conclusions

These results show that the meditative intervention used in this study produces neurophysiological changes, in particular the modulation of oscillatory activity of the brain.

Significance

Our meditative interventions might induce the neurophysiological changes associated with the improvement of psychological symptoms in the PTRD subjects.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6402287/

 

Improve Attentional Monitoring of Others Emotions with Mindfulness

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Improve Attentional Monitoring of Others Emotions with Mindfulness

 

By John M. de Castro, Ph.D.

 

“experience with mindfulness meditation is associated with distinct reactions to emotional provocations in attention and social decision-making tasks, and have implications for understanding the relationship between mindfulness meditation and emotion regulation.” – Deidre Reis

 

Mindfulness practice has been shown to improve emotion regulation. Practitioners demonstrate the ability to fully sense and experience emotions, but respond to them in more appropriate and adaptive ways. In other words, mindful people are better able to experience yet control their responses to emotions. The ability of mindfulness training to improve emotion regulation is thought to be the basis for a wide variety of benefits that mindfulness provides to mental health and the treatment of mental illness especially depression and anxiety disorders.

 

There is evidence that mindfulness training improves emotion regulation by altering the brain. A common method to study the activity of the nervous system is to measure the electrical signal at the scalp above brain regions. Changes in this activity are measurable with mindfulness training. One method to observe emotional processing in the brain is to measure the changes in the electrical activity that occur in response to specific emotional stimuli. These are called event-related potentials or ERPs. The signal following a stimulus changes over time.

 

The fluctuations of the signal after specific periods of time are thought to measure different aspects of the nervous system’s processing of the stimulus. The N200 response in the evoked potential (ERP) is a negative going electrical response occurring between a 2.0 to 3.5 tenths of a second following the target stimulus presentation. The N200 component is thought to reflect attentional monitoring of conflict. The P300 response in the evoked potential (ERP) is a positive going electrical response occurring between a 3.5 to 6.0 tenths of a second following the target stimulus presentation. The P300 component is thought to reflect inhibitory processes.

 

In today’s Research News article “Brief mindfulness training enhances cognitive control in socioemotional contexts: Behavioral and neural evidence.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641506/), Quaglia and colleagues recruited healthy adults and randomly assigned them to receive 4 20-minute sessions of either mindfulness training or book listening. They were measured before and after training for mindfulness and were tested with an emotional go no-go task in which they were asked to press a button when a picture of a face was presented that expressed a particular emotion and not respond to faces with other emotions. The pictures were of faces expression either anger, happiness, or neutral emotions. During the task the brain electrical activity was recorded with an electroencephalograph (EEG).

 

They found, as expected, that the group receiving mindfulness training, in comparison to the book listening group, had significantly higher mindfulness following training. They found that the mindfulness group, after training had significantly better scores, including both speed and accuracy, for facial emotion discrimination than the control group. With the evoked potentials, they found that on no-go trials, trials where the target facial emotion was not present. The mindfulness trained participants had significantly larger N200 amplitudes than the controls.

 

These results suggest that mindfulness training makes the individual more sensitive to emotional expressions by others. The evoked potentials in the EEGs suggest that mindfulness training did this by enhancing the brain’s ability to pay attention and monitor conflict allowing the individual to better withhold responses when appropriate. This could, in part, explain the improvement of emotion regulation with mindfulness training and may be the basis for the prior findings that mindfulness training improves responding in social contexts.

 

So, improve attentional monitoring of others emotions with mindfulness.

 

“our cognitive structures, as a developmental system, have the capacity to advance to a higher (more accurate) level of understanding about social and psychological reality, as the result of learning from the interacting experiences.” – Key Sun

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Quaglia, J. T., Zeidan, F., Grossenbacher, P. G., Freeman, S. P., Braun, S. E., Martelli, A., … Brown, K. W. (2019). Brief mindfulness training enhances cognitive control in socioemotional contexts: Behavioral and neural evidence. PloS one, 14(7), e0219862. doi:10.1371/journal.pone.0219862

 

Abstract

In social contexts, the dynamic nature of others’ emotions places unique demands on attention and emotion regulation. Mindfulness, characterized by heightened and receptive moment-to-moment attending, may be well-suited to meet these demands. In particular, mindfulness may support more effective cognitive control in social situations via efficient deployment of top-down attention. To test this, a randomized controlled study examined effects of mindfulness training (MT) on behavioral and neural (event-related potentials [ERPs]) responses during an emotional go/no-go task that tested cognitive control in the context of emotional facial expressions that tend to elicit approach or avoidance behavior. Participants (N = 66) were randomly assigned to four brief (20 min) MT sessions or to structurally equivalent book learning control sessions. Relative to the control group, MT led to improved discrimination of facial expressions, as indexed by d-prime, as well as more efficient cognitive control, as indexed by response time and accuracy, and particularly for those evidencing poorer discrimination and cognitive control at baseline. MT also produced better conflict monitoring of behavioral goal-prepotent response tendencies, as indexed by larger No-Go N200 ERP amplitudes, and particularly so for those with smaller No-Go amplitude at baseline. Overall, findings are consistent with MT’s potential to enhance deployment of early top-down attention to better meet the unique cognitive and emotional demands of socioemotional contexts, particularly for those with greater opportunity for change. Findings also suggest that early top-down attention deployment could be a cognitive mechanism correspondent to the present-oriented attention commonly used to explain regulatory benefits of mindfulness more broadly.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641506/

 

Different Activity of the Brain is Associated with Meditation

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Different Activity of the Brain is Associated with Meditation

 

By John M. de Castro, Ph.D.

 

“Backed by 1000’s of studies, meditation is the neuroscientific community’s most proven way to upgrade the human brain.” – EOC Institute

 

There has accumulated a large amount of research demonstrating that mindfulness has significant benefits for psychological, physical, and spiritual wellbeing. One way that mindfulness practices may produce these benefits is by altering the brain. The nervous system is a dynamic entity, constantly changing and adapting to the environment. It will change size, activity, and connectivity in response to experience. These changes in the brain are called neuroplasticity. Over the last decade neuroscience has been studying the effects of contemplative practices on the brain and has identified neuroplastic changes in widespread areas. In other words, mindfulness practice appears to mold and change the brain, producing psychological, physical, and spiritual benefits.

 

In today’s Research News article “Mindfulness Meditation Is Related to Long-Lasting Changes in Hippocampal Functional Topology during Resting State: A Magnetoencephalography Study.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6312586/), Lardone and colleagues recruited healthy adult participants who had practiced Vipassana meditation for at least one year and participants who had never meditated. They recorded functional connectivity of brain regions with magnetoencephalography, a technique to record brain activity.

 

They found that in comparison to non-meditators, the meditators had increased activity in the Amygdala in the gamma frequency band (25-100 hz), the Hippocampus, the Caudate and the Cingulum in the Theta frequency band (4-8 hz), and the prefrontal cortex in the alpha frequency band (8-12 hz). Hence, there were significant differences in neural activity in the brains of meditators vs. non-meditators.

 

This study is correlative and causation cannot be determined. Meditation may cause these brain activity changes, or people with these kinds of brain activity are likely to engage in meditation, or some third factor may cause them both to covary. Nevertheless, it is clear that meditation practice is associated with different brain activity. This may be the physiological process that underlies some or all of the widespread psychological and physical benefits of meditation practice.

 

“Meditation provides experiences that the mind can achieve no other way, such as inner silence and expanded awareness. And as the mind gains experience, the brain shows physical activity as well—sometimes profound changes.” – Deepak Chopra

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Lardone, A., Liparoti, M., Sorrentino, P., Rucco, R., Jacini, F., Polverino, A., … Mandolesi, L. (2018). Mindfulness Meditation Is Related to Long-Lasting Changes in Hippocampal Functional Topology during Resting State: A Magnetoencephalography Study. Neural plasticity, 2018, 5340717. doi:10.1155/2018/5340717

 

Abstract

It has been suggested that the practice of meditation is associated to neuroplasticity phenomena, reducing age-related brain degeneration and improving cognitive functions. Neuroimaging studies have shown that the brain connectivity changes in meditators. In the present work, we aim to describe the possible long-term effects of meditation on the brain networks. To this aim, we used magnetoencephalography to study functional resting-state brain networks in Vipassana meditators. We observed topological modifications in the brain network in meditators compared to controls. More specifically, in the theta band, the meditators showed statistically significant (p corrected = 0.009) higher degree (a centrality index that represents the number of connections incident upon a given node) in the right hippocampus as compared to controls. Taking into account the role of the hippocampus in memory processes, and in the pathophysiology of Alzheimer’s disease, meditation might have a potential role in a panel of preventive strategies.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6312586/

 

Alter Brain Activation Regardless of Depression with Mindfulness

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Alter Brain Activation Regardless of Depression with Mindfulness

 

By John M. de Castro, Ph.D.

 

“Now, as the popularity of mindfulness grows, brain imaging techniques are revealing that this ancient practice can profoundly change the way different regions of the brain communicate with each other – and therefore how we think – permanently.” – Tom Ireland

 

The nervous system is a dynamic entity, constantly changing and adapting to the environment. It will change size, activity, and connectivity in response to experience. These changes in the brain can be relatively permanent and are called neuroplasticity. Over the last decade neuroscience has been studying the effects of contemplative practices on the brain and has identified neuroplastic changes in widespread areas. In other words, meditation practice appears to mold and change the brain, producing psychological, physical, and spiritual benefits.

 

The brain produces rhythmic electrical activity that can be recorded from the scalp. The neuroplastic changes in the brain may be seen by recording the brain’s electrical activity with the electroencephalogram (EEG). It is possible that the EEG can be used to indirectly observe the activity of the brain and changes in the brain activation produced by mindfulness training and its consequent improvements in mental health.

 

In today’s Research News article “Spiking Neural Network Modelling Approach Reveals How Mindfulness Training Rewires the Brain.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6478904/), Doborjeh and colleagues recruited adults and provided them with a 6-week, once a week for 90-120 minutes, mindfulness training. They separated the participants based upon a paper and pencil measure of depression into low depression, no depression, and high depression groups. Before and after training they measured the participants brain electrical activity with an electroencephalogram (EEG). They then employed a sophisticated data analysis algorithm to follow bursts of electrical activity through the brain (Spiking Neural Network).

 

They found that the no depression and low depression groups had overall higher activation than the high depression group. After mindfulness training the high depression group had higher activation at the frontal, temporal, frontocentral, and centroparietal sites, while the no depression group had higher activation of the frontal and occipitalparietal cortical areas, and the low depression group had higher activation at the frontal, temporal, and frontocentral sites.

 

The results are interesting and suggest that the Spiking Neural Network analysis of the electroencephalogram (EEG) can detect differences in brain activation in groups varying in levels of depression and can also detect neuroplastic changes resulting from mindfulness training. This is an important demonstration as it verifies that the easy, non-invasive, and economical EEG recording technique can be used to assess the details of neural function and the changes in neural function that may occur after an intervention.

 

Additionally, the results suggest that depressed individuals have quite low levels of brain activation which may, in part, be responsible for their depression. The results also show that mindfulness training in these depressed individuals can, to some extent, raise the levels of brain activation. This may be responsible, in part, for the ability of mindfulness training to decrease depression levels in depressed individuals. In addition, the results suggest that even in low and non-depressed individuals, mindfulness training can further increase brain activation. This may be responsible for the improvement in emotion regulation and mood in normal individuals that is produced by mindfulness training.

 

So, alter brain activation regardless of depression with mindfulness.

 

“There is emerging evidence that mindfulness meditation might cause neuroplastic changes in the structure and function of brain regions involved in regulation of attention, emotion and self-awareness.” – Britta Hőlzel

 

CMCS – Center for Mindfulness and Contemplative Studies

 

This and other Contemplative Studies posts are also available on Google+ https://plus.google.com/106784388191201299496/posts and on Twitter @MindfulResearch

 

Study Summary

 

Doborjeh, Z., Doborjeh, M., Taylor, T., Kasabov, N., Wang, G. Y., Siegert, R., & Sumich, A. (2019). Spiking Neural Network Modelling Approach Reveals How Mindfulness Training Rewires the Brain. Scientific reports, 9(1), 6367. doi:10.1038/s41598-019-42863-x

 

Abstract

There has been substantial interest in Mindfulness Training (MT) to understand how it can benefit healthy individuals as well as people with a broad range of health conditions. Research has begun to delineate associated changes in brain function. However, whether measures of brain function can be used to identify individuals who are more likely to respond to MT remains unclear. The present study applies a recently developed brain-inspired Spiking Neural Network (SNN) model to electroencephalography (EEG) data to provide novel insight into: i) brain function in depression; ii) the effect of MT on depressed and non-depressed individuals; and iii) neurobiological characteristics of depressed individuals who respond to mindfulness. Resting state EEG was recorded from before and after a 6 week MT programme in 18 participants. Based on self-report, 3 groups were formed: non-depressed (ND), depressed before but not after MT (responsive, D+) and depressed both before and after MT (unresponsive, D−). The proposed SNN, which utilises a standard brain-template, was used to model EEG data and assess connectivity, as indicated by activation levels across scalp regions (frontal, frontocentral, temporal, centroparietal and occipitoparietal), at baseline and follow-up. Results suggest an increase in activation following MT that was site-specific as a function of the group. Greater initial activation levels were seen in ND compared to depressed groups, and this difference was maintained at frontal and occipitoparietal regions following MT. At baseline, D+ had great activation than D−. Following MT, frontocentral and temporal activation reached ND levels in D+ but remained low in D−. Findings support the SNN approach in distinguishing brain states associated with depression and responsiveness to MT. The results also demonstrated that the SNN approach can be used to predict the effect of mindfulness on an individual basis before it is even applied.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6478904/