Meditation

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/

 

Meditation Practice is Growing Rapidly Among Children and Adolescents

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Meditation Practice is Growing Rapidly Among Children and Adolescents

 

By John M. de Castro, Ph.D.

 

“It’s almost as though meditation was designed for kids. They just ‘get it’ – there is this elasticity and freedom in their minds which allows them to be present in the moment and free from any external thoughts or pressures.” – Andy Puddicombe

 

Childhood is a miraculous period during which the child is dynamically absorbing information from every aspect of its environment. This occurs almost without any intervention from the adults as the child appears to be programmed to learn. It is here that behaviors, knowledge, skills, and attitudes are developed that shape the individual. Adolescence is a time of mental, physical, social, and emotional growth. It is during this time that higher levels of thinking, sometimes called executive function, develops.

 

Childhood and adolescence can be difficult times, fraught with challenges. During this time the child transitions to young adulthood; including the development of intellectual, psychological, physical, and social abilities and characteristics. There are so many changes occurring during this time that the child or adolescent can feel overwhelmed and unable to cope with all that is required.

 

Mindfulness training for children and adolescents has been shown to have very positive effects. These include academic, cognitive, psychological, and social domains. Mindfulness training has been shown to improve emotion regulation and to benefit the psychological and emotional health of adolescents. Importantly, mindfulness training with children and adolescents appears to improve the self-concept, improves attentional ability and reduces stress. These benefits are becoming more widely appreciated and should have led to greater numbers of children and adolescents practicing meditation.

 

In today’s Research News article “Prevalence, patterns, and predictors of meditation use among U.S. children: Results from the National Health Interview Survey.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6502253/), Wang and Gaylord analyzed the data from the 2017 National Health Interview Survey, separating that  obtained from children and adolescents. They recorded meditation use, health records, and health care utilization.

 

They found that 7.4% of the children and adolescents practiced meditation. This was a very large increase from the 1.6% that was found in 2012. 1.0% of the children and adolescents used mantra meditation, 1.6% used mindfulness meditation, 4.0% used spiritual meditation, and 3.0% practiced meditation as part of yoga, tai chi, or qigong. They also found that meditation was more likely to be used by youths whose parent completed some college, had headaches, depression, or a respiratory allergy, and who lived in the western U.S. Children or adolescents who had medical conditions were more likely to use mindfulness meditation. Surprisingly, neither age, gender, race, nor socioeconomic status was associated with different frequencies of meditation use.

 

These results are interesting and document the tremendous increase in the acceptability and utilization of meditation practice by children and adolescents over the last 5 years. This has probably occurred due to the increased recognition of the benefits of mindfulness practices for the physical and psychological health of children and adolescents and it’s increased practice in schools. It will be interesting to see if this trend continues over the next 5 years.

 

“Our kids’ brains are tired, and children of all ages really need opportunities where they can take time out each day “unplugged” to relax and focus. Meditation offers this break and helps kids function more effectively and clearly.” – Healthy Children

 

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

 

Wang, C., Li, K., & Gaylord, S. (2019). Prevalence, patterns, and predictors of meditation use among U.S. children: Results from the National Health Interview Survey. Complementary therapies in medicine, 43, 271–276. doi:10.1016/j.ctim.2019.02.004

 

Abstract

Objectives:

The purpose of the study is to examine the characteristics of various types of meditation use (i.e., mantra, mindful, and spiritual meditation) among U.S. children.

Methods:

Using 2017 National Health Interview Survey, we examined the prevalence, patterns, and potential predictors of meditation use among U.S. children aged 4 to 17 years. Descriptive statistics, Wald F chi-square test, and multivariable logistic regression were used for data analysis (n = 6925).

Results:

Overall meditation use has increased substantially from 1.6% in 2012 to 7.4% in 2017 among children in the US. Children with chronic medical conditions were more likely to use mindful meditation (Adjusted Odds Ratio (AOR) = 1.9–3.6, 95% CI [1.0–7.4]). Regularly taking prescription medication had an inverse relation with mantra meditation use (AOR = 0.4, 95% CI [0.2–0.9]). Children with delayed medical care due to access difficulties were more likely to use spiritual meditation, compared to those who did not (AOR = 1.7, 95% CI [1.1–2.6]).

Conclusions:

Meditation use has rapidly increased among U.S. children within the past few years. Future studies should explore the underlying reasons for this increase and its potential benefits for pediatric meditators.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6502253/

 

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/

 

Relieve Depression in Latino Immigrants with Mindfulness Meditation

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Relieve Depression in Latino Immigrants with Mindfulness Meditation

 

By John M. de Castro, Ph.D.

 

“with practice, meditation can help many people control how they react to the stress and anxiety that often leads to depression,” – John Denninger

 

Depression affects over 6% of the population. Depression can be difficult to treat. It is usually treated with antidepressant medication. But, of patients treated initially with drugs only about a third attained remission of the depression. After repeated and varied treatments including drugs, therapy, exercise etc. only about two thirds of patients attained remission. But drugs often have troubling side effects and can lose effectiveness over time. Clearly, there is a need for treatment alternatives that can be effective alone or in combination with drugs.

 

A particularly vulnerable population is Latino immigrants. They experience many forms of stress while attempting to acculturate to the new culture which frequently produces depression. Mindfulness practices including meditation have been found to be effective in relieving depression and preventing its reoccurrence. There is, however, a lack of studies of the effectiveness of meditation practice on depression in stressed Latino immigrant populations.

 

In today’s Research News article “Mindfulness meditation and improvement in depressive symptoms among Spanish- and English speaking adults: A randomized, controlled, comparative efficacy trial.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6611613/), Lopez-Maya and colleagues recruited adult Latino immigrants who reported high levels of psychological distress and stress. They were randomly assigned to receive 6 weeks of once a week for 2 hours group-based sessions in either mindfulness meditation or health education. The mindfulness meditation program consisted of “mindful sitting meditation, mindful eating, appreciation meditation, friendly or loving-kindness meditation, mindful walking, and mindful movement.” They were measured before and after training for depression, mindfulness, and perceived stress.

 

They found that in comparison to baseline and the health education group, after mindfulness meditation training there was a significant reduction in depression with small to moderate effect size, and large significant increases in mindfulness with large effect size. Hence, the mindfulness meditation program was successful in improving mindfulness and relieving depression in a Latino immigrant population.

 

The fact that mindfulness meditation training reduced depression is not surprising as the efficacy of this training for depression has been well established with a large number of studies. What the current study establishes is that mindfulness meditation training is effective in treating depression in Latino immigrants who are stressed and are experiencing psychological distress. Immigration is difficult and challenging. The present results suggest that mindfulness meditation training is a safe and effective method to help alleviate the psychological effects of these stresses and thereby improve the well-being of the immigrants. Future studies should evaluate the long-term effectiveness of this training for depression.

 

So, relieve depression in latino immigrants with mindfulness meditation.

 

“Depression is rooted in fears about the future and regrets about the past. Focusing on the moment, not the past or the future, is the secret behind meditation’s power.” – Eoc Institute

 

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

 

Lopez-Maya, E., Olmstead, R., & Irwin, M. R. (2019). Mindfulness meditation and improvement in depressive symptoms among Spanish- and English speaking adults: A randomized, controlled, comparative efficacy trial. PloS one, 14(7), e0219425. doi:10.1371/journal.pone.0219425

 

Abstract

Objective

Latino immigrants experience acculturative stress and increased depression risk. Mindfulness meditation improves depressive symptoms, yet the vast majority of research has focused on English speaking populations.

Methods

In this randomized clinical trial with 2 parallel treatment groups, adults with moderate levels of perceived stress (n = 76) were recruited from the Los Angeles community from October 2015 to March 2016, stratified into Spanish- (n = 36) and English speaking (n = 40) language groups, and randomized for 6 weeks of treatment with standardized mindful awareness practices (MAPs) or health education (HE). Main outcome measure was depressive symptoms, measured by the Beck Depression Inventory.

Results

Using an intent-to-treat analysis, the primary outcome, depressive symptoms as indexed by the Beck Depression Inventory, showed greater improvement in MAPs vs. HE, with a between-group post-intervention mean difference of -2.2 (95% CI -4.4 – -0.07) and effect size of 0.28; similar effect sizes were found in the the Spanish- (0.29) and English speaking (0.30) groups. MAPs showed significant improvement relative to HE on secondary outcome of mindfulness with between group difference of 10.7 (95% CI4.5–16.9), but not perceived stress.

Conclusion

The comparable efficacy of Spanish and English formats of mindfulness meditation in improving depressive symptoms suggests that this community based intervention may mitigate depression risk in Latino adults who are experiencing social adversity.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6611613/

 

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/

 

Structural and Functional Changes in the Brain Produced by Meditation Training

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Structural and Functional Changes in the Brain Produced by Meditation Training

 

By John M. de Castro, Ph.D.

 

“Measurable changes in brain regions associated with memory, sense of self, empathy, and stress start to appear in subjects who practice mindfulness meditation for only eight weeks.” – Deepak Chopra

 

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.

 

Although, these changes have been documented, there is scant evidence regarding the temporal course of the neural changes with increasing experience with meditation. In today’s Research News article “Alterations in Brain Structure and Amplitude of Low-frequency after 8 weeks of Mindfulness Meditation Training in Meditation-Naïve Subjects.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6662752/), Yang and colleagues recruited meditation naïve college students and provided them with a 8 week meditation training program. They met for 1.5 hours once a week and were requested to meditate at home for 45 minutes daily. They were measured before and after the meditation program for mindfulness, anxiety, depression, and mood, including anger, fatigue, tension, depression, vigour and friendliness. In addition, their brains were measured with functional Magnetic Resonance Imaging (fMRI) before and after training.

 

They found that after meditation training there were significant decreases in anxiety and depression and significant increases in the non-reactivity facet of mindfulness. Cortical thickness significantly increased over training in the precuneus and superior parietal lobule while local brain activity fluctuations decreased in the precuneus and inferior parietal lobule. The parietal cortex is associated with bodily sensation and self-referential thinking while the precuneus is associated with the default mode network involved in mind wandering and self-referential thought.

 

The study did not contain a control condition. So, conclusion must be reached carefully. But the results suggest that mindfulness meditation training decreases anxiety and depression, which has been previously well documented. The neural findings that meditation training resulted in decreased brain activity fluctuations in the precuneus and inferior parietal lobule suggests that the training reduces activity in brain regions associated with mind wandering and self-referential thinking, which have also been well documented previously. Focusing on the present moment as is trained in mindfulness meditation cannot coexist with mind wandering and self-referential thinking. So, it is not surprising that there’s reduced activity in the brain regions underlying these functions.

 

All of this suggests that mindfulness meditation training changes the brain in ways that reflect greater present moment awareness and less daydreaming and discursive thinking.

 

“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

 

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

 

Chuan-Chih Yang, Alfonso Barrós-Loscertales, Meng Li, Daniel Pinazo, Viola Borchardt, César Ávila, Martin Walter. Alterations in Brain Structure and Amplitude of Low-frequency after 8 weeks of Mindfulness Meditation Training in Meditation-Naïve Subjects. Sci Rep. 2019; 9: 10977. Published online 2019 Jul 29. doi: 10.1038/s41598-019-47470-4

 

Abstract

Increasing neuroimaging evidence suggests that mindfulness meditation expertise is related to different functional and structural configurations of the default mode network (DMN), the salience network (SN) and the executive network at rest. However, longitudinal studies observing resting network plasticity effects in brains of novices who started to practice meditation are scarce and generally related to one dimension, such as structural or functional effects. The purpose of this study was to investigate structural and functional brain network changes (e.g. DMN) after 40 days of mindfulness meditation training in novices and set these in the context of potentially altered depression symptomatology and anxiety. We found overlapping structural and functional effects in precuneus, a posterior DMN region, where cortical thickness increased and low-frequency amplitudes (ALFF) decreased, while decreased ALFF in left precuneus/posterior cingulate cortex correlates with the reduction of (CES-D) depression scores. In conclusion, regional overlapping of structural and functional changes in precuneus may capture different components of the complex changes of mindfulness meditation training.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6662752/

 

Strengthen Character with Mindfulness

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Strengthen Character with Mindfulness

 

By John M. de Castro, Ph.D.

 

“Mindfulness opens the door to who we are, and character strengths are what is behind that door.” – Ryan Niemiec

 

Personality characteristics are thought to be relatively permanent traits that form an individual’s distinctive character. Engaging in mindfulness training has been shown to have a large number of beneficial effects on the psychological, emotional, and physical health of the individual and is helpful in the treatment of mental and physical illness. It also appears to be associated with healthy personality characteristics. Character strengths are group of positive personality characteristics that are highly valued such as “creativity, curiosity, open-mindedness, love of learning, perspective, bravery, perseverance, zest, love, social intelligence, forgiveness, self-regulation, appreciation of beauty, gratitude, hope, and spirituality.” This suggests that mindfulness may be associated with and may improve these character strengths.

 

In today’s Research News article “The Mutual Support Model of Mindfulness and Character Strengths.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6647542/),  Pang and Ruch recruited participants online and had them complete an online questionnaire measuring mindfulness and 24 character strengths. They found that the higher the mindfulness scores the higher the character strengths. They then separated the participants in those who meditated and those who didn’t. They found that the meditators had significantly higher levels of mindfulness, and the character strengths of spirituality, gratitude, appreciation of beauty, curiosity, love of learning, curiosity, hope, bravery, leadership, zest, perspective, self-regulation, and humor.

 

In a second study they recruited adults and randomly assignee them to a wait-list control condition or to receive Mindfulness-Based Stress Reduction (MBSR) program. The MBSR program consists of 8 weekly 2-hour group sessions involving meditation, yoga, body scan, and discussion. The participants are also encouraged to perform daily practice. They were measured before and after training and 1, 3, and 6 months later for mindfulness and the 24 character strengths. They found that in comparison to baseline and the wait-list controls, after training and the follow-up measures the participants who received MBSR training had significantly higher levels of mindfulness, love, appreciation of beauty, gratitude, spirituality, zest, and bravery.

 

The 2 studies suggest that mindfulness is associated with character strengths and increasing mindfulness with MBSR training produces enduring increases in the levels of these strengths. The character strengths that were most associated with mindfulness, hope, bravery, curiosity, social intelligence, zest, love, perspective, and gratitude, have been shown to be associated with greater life satisfaction. This underscores the contribution of mindfulness to psychological health and happiness.

 

So, strengthen character with mindfulness.

 

“The combination of practicing mindfulness with a focus on character strengths helps us to open the door to avenues to self growth. With improved awareness of our character strengths we can more easily overcome common obstacles that emerge when developing mindfulness and serve to “supercharge” both mindful living and formal mindfulness meditation.” – Susan Kuz

 

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

 

Pang, D., & Ruch, W. (2019). The Mutual Support Model of Mindfulness and Character Strengths. Mindfulness, 10(8), 1545–1559. doi:10.1007/s12671-019-01103-z

 

Abstract

Objectives

Numerous studies have confirmed robust relationships between general well-being and mindfulness or character strengths, respectively, but few have examined associations between mindfulness and character strengths. Two studies were carried out to explore these relationships comprehensively in the framework of the Values in Action (VIA) classification of character strengths.

Methods

In study 1, participants (N = 1335) completed validated assessments of mindfulness and character strengths, and the relationship between the two was investigated in a broad online sample. In study 2, the effect of a mindfulness training on specific character strengths was investigated using a randomized-control design (N = 42).

Results

The results of study 1 confirmed positive relationships between mindfulness and character strengths and further identified a list of character strengths that might overlap with mindfulness—i.e., creativity, curiosity, open-mindedness, love of learning, perspective, bravery, perseverance, zest, love, social intelligence, forgiveness, self-regulation, appreciation of beauty, gratitude, hope, and spirituality. The findings of study 2 provided further support for the hypothesis that mindfulness training could help cultivate certain character strengths. Compared with participants in the waitlist control condition, those who attended an 8-week mindfulness-based training program showed significant increases in the strengths of love, appreciation of beauty, gratitude, and spirituality, and a trend toward significant increases in the strengths of zest and bravery.

Conclusions

The results provide initial evidence for a mutual support model of mindfulness and character strengths.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6647542/

 

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 Well-Being, Attention, and Emotions with Meditation

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Improve Well-Being, Attention, and Emotions with Meditation

 

By John M. de Castro, Ph.D.

 

“How are you feeling? Meditation gives us a chance to entertain that question at a deeper level. It can give us the room to fully experience an emotion for what it is.” – Mindful

 

Mindfulness practice has been shown to improve emotions and their regulation. Practitioners demonstrate more positive and less negative emotions and the ability to fully sense and experience emotions, while responding to them in 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 are, however, a number of different meditation techniques. Two common forms are focused and open monitoring meditation practices. In focused attention meditation, 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 open monitoring meditation, the individual opens up awareness to everything that’s being experienced regardless of its origin. These include bodily sensations, external stimuli, and even thoughts. The meditator just observes these thoughts and lets them arise and fall away without paying them any further attention.

 

What forms of meditation work best to improve emotions and over what period of time is necessary for practice to produce benefits have not been well studied. In today’s Research News article “The Effects of Different Stages of Mindfulness Meditation Training on Emotion Regulation.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6610260/), Zhang and colleagues recruited young adults (aged 19-32) who had not engaged in meditation practice previously and randomly assigned them to either a wait list control condition or an 8-week mindfulness training program. The mindfulness training consisted of 4 weeks of focused meditation followed by 4 weeks of open monitoring meditation. They met for 2 hours once a week and were requested to practice at home daily for 20-30 minutes. They were measured before training, at the 4-week point of training and after training for mindfulness, positive and negative emotions, anxiety, depression, rumination, and a cognitive attention task (Stroop task).

 

They found that the meditation group significantly increased in mindfulness from baseline to the 4-week point with further increases observed at 8 weeks, while the control group did not increase. For the meditation group positive emotions were significant higher at both 4 and 8 weeks while rumination, negative emotions, anxiety, and depression were significant lower. The meditation group also had significantly improved ability to attend to stimuli amid interference at 4- and 8-weeks post-training while the control group did not.

 

The results are interesting and suggest that 4 weeks of focused meditation practice improves the psychological well-being of young adults while an additional 4 weeks of open monitoring meditation practice either maintains or further increases the benefits. These results replicate many previous findings that mindfulness training significantly improves mindfulness, attention, and emotions, and significantly reduces rumination, anxiety, and depression. This strongly supports providing meditation training for young adults to improve their psychological health and well-being.

 

So, improve well-being, attention, and emotions with meditation.

 

“in order to successfully navigate life, you need to be able to both name the emotion you’re experiencing and describe the feelings that make up your experience. This is where meditation can help, by teaching us to observe, identify, and respond instead of just react.” – Richard Miller

 

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

 

Zhang, Q., Wang, Z., Wang, X., Liu, L., Zhang, J., & Zhou, R. (2019). The Effects of Different Stages of Mindfulness Meditation Training on Emotion Regulation. Frontiers in human neuroscience, 13, 208. doi:10.3389/fnhum.2019.00208

 

Abstract

This study examined mood enhancement effects from 4-week focusing attention (FA) meditation and 4-week open monitoring (OM) meditation in an 8-week mindfulness training program designed for ordinary individuals. Forty participants were randomly assigned to a training group or a control group. All participants were asked to perform cognitive tasks and subjective scale tests at three time points (pre-, mid-, and post-tests). Compared with the participants in the control group, the participants in the meditation training group showed significantly decreased anxiety, depression, and rumination scores; significantly increased mindfulness scores; and significantly reduced reaction times (RTs) in the incongruent condition for the Stroop task. The present study demonstrated that 8-week mindfulness meditation training could effectively enhance the level of mindfulness and improve emotional states. Moreover, FA meditation could partially improve individual levels of mindfulness and effectively improve mood, while OM meditation could further improve individual levels of mindfulness and maintain a positive mood.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6610260/