Change the Brain to Deal with Uncomfortable Sensations 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. For example, the brain area that controls the right index finger has been found to be larger in blind subjects who use braille than in sighted individuals. Similarly, cab drivers in London who navigate the twisting streets of the city, have a larger hippocampus, which is involved in spatial navigation, than predefined route bus drivers. 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 produce relatively permanent changes in the brain, producing psychological, physical, and spiritual benefits.
Dealing with aversive or painful stimuli can be stressful and difficult. There are, however, methods that can improve the individual’s ability to effectively cope with them. Indeed, mindfulness training has been shown to reduce the experience of and response to aversive stimuli and to reduce the physiological and psychological responses to stress. There are indications that mindfulness training may do so by altering the nervous system. The brain regions of the insula and the anterior cingulate cortex have been shown to be involved in interoceptive awareness, that is the conscious appreciation of the internal state of the body. Hence, these structures would be involved in the processing of aversive and painful stimuli. It would seem reasonable, then, to theorize that mindfulness training improves coping with the pain and stress produced by aversive stimuli by changing the activation of the insula and the anterior cingulate cortex.
In today’s Research News article “Mindfulness-based training attenuates insula response to an aversive interoceptive challenge.” See summary below or view the full text of the study at:
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4692309/
Haase and colleagues recruited U.S. Marines who were undergoing pre-deployment training. They were randomly assigned to receive either the usual training or the training plus 8 weeks of mindfulness training occurring in weekly 2-hour sessions. They were also encouraged to practice 30 minutes per day by themselves. Before and after training they were measured for mindfulness, response to stressful experiences, and sleep quality. In addition, both before and after training the Marines completed a vigilance task while their brains underwent Magnetic Resonance Imaging (MRI scans). While they were undergoing scanning, periodically they had their breathing restricted by increasing the load on the lungs to inhale for a number of 1-minute periods. This produced oxygen restriction that was aversive and stressful. The participants rated how aversive the breathing restriction was.
They found that the breathing restriction was indeed aversive for both groups and there was no effect of mindfulness training on the aversiveness of the restriction. The mindfulness trained Marines, however, had significantly reduced neural responses from the insula and the anterior cingulate cortex after mindfulness training, while the control group did not. Hence, although mindfulness training did not change the perceived aversiveness of the breathing restriction, it did reduce the response of the brain areas responsible for interoceptive awareness.
These results suggest that mindfulness training produced neuroplastic changes in the nervous system, altering the brain areas that are responsible for reacting and consciously appreciating aversive conditions. It has been previously demonstrated that mindfulness training reduces the experience of, and response to aversive stimuli and stress. Hence, the present findings suggest that neuroplastic alterations to the insula and the anterior cingulate cortex produced by mindfulness training may underlie the improved ability to cope with aversive stimuli.
So, change the brain to deal with uncomfortable sensations with mindfulness.
“Neuroscientists have also shown that practicing mindfulness affects brain areas related to perception, body awareness, pain tolerance, emotion regulation, introspection, complex thinking, and sense of self. While more research is needed to document these changes over time and to understand underlying mechanisms, the converging evidence is compelling.” – Christina Congleton
CMCS – Center for Mindfulness and Contemplative Studies
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Study Summary
Haase, L., Thom, N. J., Shukla, A., Davenport, P. W., Simmons, A. N., Stanley, E. A., … Johnson, D. C. (2016). Mindfulness-based training attenuates insula response to an aversive interoceptive challenge. Social Cognitive and Affective Neuroscience, 11(1), 182–190. http://doi.org/10.1093/scan/nsu042
Abstract
Neuroimaging studies of mindfulness training (MT) modulate anterior cingulate cortex (ACC) and insula among other brain regions, which are important for attentional control, emotional regulation and interoception. Inspiratory breathing load (IBL) is an experimental approach to examine how an individual responds to an aversive stimulus. Military personnel are at increased risk for cognitive, emotional and physiological compromise as a consequence of prolonged exposure to stressful environments and, therefore, may benefit from MT. This study investigated whether MT modulates neural processing of interoceptive distress in infantry marines scheduled to undergo pre-deployment training and deployment to Afghanistan. Marines were divided into two groups: individuals who received training as usual (control) and individuals who received an additional 20-h mindfulness-based mind fitness training (MMFT). All subjects completed an IBL task during functional magnetic resonance imaging at baseline and post-MMFT training. Marines who underwent MMFT relative to controls demonstrated a significant attenuation of right anterior insula and ACC during the experience of loaded breathing. These results support the hypothesis that MT changes brain activation such that individuals process more effectively an aversive interoceptive stimulus. Thus, MT may serve as a training technique to modulate the brain’s response to negative interoceptive stimuli, which may help to improve resilience.