Change the Brain to Reduce Anxiety with Meditation
By John M. de Castro, Ph.D.
“In mindfulness practice you have an opportunity—the mental time and space, if you will—to see more elements of the story, a richer picture. “You may see more clearly as you anticipate a difficult encounter what the underlying emotion is that’s triggered and how it’s showing up in your body.” In this way, you become aware of the full context of the story, like seeing a flower opening in slow-motion photography. With this awareness, over time “your solid belief in a storyline may begin to erode.” – Zindel Segal
Meditation 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. Meditation practice has been found to improve the regulation of emotions and reduce difficult emotional states such as anxiety and depression.
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. Meditation practice has been shown to change the brain and the brain’s reaction to emotions. The activity of the amygdala in the brain is highly associated with emotions. Hence, it would appear likely that meditation practice may alter the amygdala’s activity in response to emotions.
In today’s Research News article “Atypical Anxiety-Related Amygdala Reactivity and Functional Connectivity in Sant Mat Meditation.” (See summary below or view the full text of the study at: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6288484/ ), Chen and colleagues recruited healthy highly experienced meditators and healthy meditation naive participants. The meditators practiced Sant Mat meditation for 4 hours per day and had been practicing for at least 4 years. They also had a vegetarian diet and abstained from alcohol. The meditation practice incorporated loving kindness meditation.
All participants were measured for their state anxiety and their trait anxiety. The participants viewed colorized pictures of faces while their brain activity was monitored with functional Magnetic Resonance Imaging (fMRI). They were asked to ignore everything about the faces except their color which they responded to with a button press. The faces were both male and female expressing either happy, fearful, or neutral emotions.
They found that the meditators were significantly less anxious than the controls in both state and trait anxiety and the greater the number of years of meditation experience the lower the levels of anxiety. The meditators were also significantly slower in responding to the faces color. Slower responding has been associated with lower anxiety. It is well documented that meditation practice lowers anxiety. So, the lower levels in the meditators and slower responding were expected.
In terms of the brain amygdala responses to the face stimuli, the meditators had significantly lower responses regardless of the emotion portrayed. In addition, the meditators had a stronger amygdala response to happy faces than fearful faces while the controls had the opposite pattern with higher amygdala responses to fearful faces than happy faces. Mediation analysis indicated that the years of meditation experience was directly related to lower anxiety but the amygdala response partly meditated the effect such that the more years of meditation experience the lower the response of the amygdala and the lower the levels of anxiety.
These are interesting and entirely consistent results. The amygdala is known to be involved in emotionality. The results suggest that meditation experience alters the amygdala to respond less to emotional stimuli and to respond more to positive emotional stimuli than negative emotional stimuli. These lower responses may be the source of the effect of meditation practice of improved regulation of emotions. The greater responses of the amygdala in meditators to positive emotional stimuli may be the source of the effect of meditation practice of increased happiness.
It needs to be recognized that the meditators also had vegetarian diets and abstained from alcohol while the meditation naïve participants did not. It is possible that the differences observed stemmed from these differences rather than the meditation. It should also be noted that the meditators practiced 4 hours per day which is much more than most meditators, placing these meditators as outliers of amounts of meditation practice. Whether similar results may be observed with lower levels of meditation practice should be an important question for future research.
So, change the brain to reduce anxiety with meditation.
“To me, this amazing brain science and the very real rewards gained from meditation combine to form a compelling argument for developing and/or maintaining a daily practice. It definitely motivates me on those days I don’t “feel” like sitting. So, try to remind yourself that meditating every day, even if it’s only 15 minutes, will keep those newly formed connections strong and those unhelpful ones of the past at bay.” – Rebecca Gladding
CMCS – Center for Mindfulness and Contemplative Studies
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Study Summary
Chen, C., Chen, Y. C., Chen, K. L., & Cheng, Y. (2018). Atypical Anxiety-Related Amygdala Reactivity and Functional Connectivity in Sant Mat Meditation. Frontiers in behavioral neuroscience, 12, 298. doi:10.3389/fnbeh.2018.00298
Abstract
While meditation has drawn much attention in cognitive neuroscience, the neural mechanisms underlying its emotional processing remains elusive. Sant Mat meditators were recruited, who adopt a loving-kindness mode of meditation along with a vegetarian diet and an alcohol-restricted lifestyle and novices. We assessed their State-Trait Anxiety Inventory (STAI) and scanned their amygdala reactivity in response to an explicit and implicit (backward masked) perception of fearful and happy faces. In contrast with novices, meditators reported lower STAI scores. Meditators showed stronger amygdala reactivity to explicit happiness than to fear, whereas novices exhibited the opposite pattern. The amygdala reactivity was reduced in meditators regardless of implicit fear or happiness. Those who had more lifetime practice in meditation reported lower STAI and showed a weaker amygdala response to fear. Furthermore, the amygdala in meditators, relative to novices, had a stronger positive functional connectivity with the ventrolateral prefrontal cortex (PFC) to explicit happiness, but a more negative connectivity with the insula and medial orbitofrontal cortex (OFC) to explicit fear. Mediation analysis indicated the amygdala reactivity as the mediator for the linkage between meditation experience and trait anxiety. The findings demonstrate the neural correlates that underpin the beneficial effects of meditation in Sant Mat. Long-term meditation could be functionally coupled with the amygdala reactivity to explicit and implicit emotional processing, which would help reduce anxiety and potentially enhance well-being.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6288484/