By John M. de Castro, Ph.D.
“Meditation gives you the wherewithal to pause, observe how easily the mind can exaggerate the severity of a setback, and resist getting drawn back into the abyss.”— Richie Davidson
We’re very emotional creatures. Without emotion, life is flat and uninteresting. Emotions provide the spice of life. We are constantly having or reacting to emotions. We often go to great lengths in an attempt to create or keep positive emotions and conversely to avoid, mitigate, or get rid of negative emotions. They are so important to us that they affect mostly everything that we do and say and can even be determinants of life or death. Anger, fear, and hate can lead to murderous consequences. Anxiety and depression can lead to suicide. At the same time love, joy, and happiness can make life worth living. Our emotions also affect us physically with positive emotions associated with health, well-being, and longevity and negative emotions associated with stress, disease, and shorter life spans. The importance of emotions is only surpassed by our ignorance of them.
Emotions occur automatically and reflexively to particularly stimuli in the environment. For example, the sight of a snake almost universally evokes a fear response, or conversely the sight of a baby smiling almost universally evokes loving feelings. Psychologists have demonstrated that these reflexive emotional reactions can be transferred to other stimuli. This occurs in a process first described by Pavlov called classical conditioning. For example, seeing a snake in a flower pot can later produce fear responses to the flower pot itself. This is called emotional learning.
One of the most important effects of mindfulness training is improving emotion regulation. Research has demonstrated that people either spontaneously high in mindfulness or trained in mindfulness are better able to be completely in touch with their emotions and feel them completely, while being able to respond to them more appropriately and adaptively. In other words, mindful people are better able to experience yet control emotions. The influence of mindfulness training on emotional learning has not, however, been extensively studied.
In today’s Research News article “Mindfulness-Based Stress Reduction, Fear Conditioning, and The Uncinate Fasciculus: A Pilot Study.” See:
or see summary below or view the full text of the study at:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4908122/
Hölzel and colleagues randomly assigned adult participants to either receive an 8-week Mindfulness-Based Stress Reduction (MBSR) program or be placed on a wait-list. Prior to and after the 8-week training period, both groups were assessed for mindfulness, perceived stress, and emotion regulation ability. They were also tested with a 2-day fear conditioning emotional learning, extinction and retention of extinction procedure which occurred while the participants laid in a Magnetic Resonance Imaging (MRI) scanner. The conditioning occurred to red and blue lights paired with a mild electric shock. Then only one light and not the other was paired with shock so that the fear response to one would decline in strength (extinguish).
They found that the MBSR training produced significant improvements in mindfulness, emotion regulation and perceived stress. In addition, the more home practice the participants engaged in the greater the improvement. They found that the MBSR participants retained the fear conditioning from prior to, to after the conditioning while the control group did not. In addition, MBSR was found to produce a significant increase in the fiber density, axonal diameter, and myelination of the Uncinate fasciclus; in other words, it increased the size of this fiber tract that interconnects the limbic system to the frontal lobes. Aslo, the greater the increase in the size of the Uncinate, the stronger the increase in the strength of the fear conditioning.
It has been repeatedly demonstrated that mindfulness (MBSR) training increases emotion regulation and decreases stress responses. So, these results in the present study were no surprise. The increased retention of the fear conditioning found after mindfulness training is interesting and suggests that the training did what is was supposed to, increasing attentiveness to environmental stimuli and thus making the individual more responsive to them over longer periods. It is possible that mindfulness training, by improving emotion regulation and stress responding allowed for better appreciation and control of prior emotional conditioning. Hence, mindfulness training appears to make us better at being attentive to and regulating both our primary and secondary (learned) emotions.
The improved retention of the fear conditioning may also result from the increased size of the Uncinate fasciculus which connects the limbic system which is known to be involved in emotions to the frontal lobes which are known to be involved in emotion regulation. Hence, the MBSR training appears to have altered the brain to accentuate the processing and regulation of emotional signals. These kind of changes in brain structure, known as neuroplasticity, are commonly found after mindfulness training. In the case of the present study the change in the brain produced by mindfulness training appears to alter the individual’s responsiveness and control of their emotions.
So, improve the brain’s emotional responses with mindfulness.
“Mindfulness practice isn’t meant to eliminate thinking but aims rather to help us know what we’re thinking when we’re thinking it, just as we want to know what we’re feeling when we’re feeling it. Mindfulness allows us to watch our thoughts, see how one thought leads to the next, decide if we’re heading toward an unhealthy path, and if so, let go and change directions. It allows us to see that who we are is much more than a fearful or envious or angry thought. We can rest in the awareness of the thought, in the compassion we extend to ourselves if the thought makes us uncomfortable, and in the balance and good sense we summon as we decide whether and how to act on the thought.” – Sharon Salzberg
CMCS – Center for Mindfulness and Contemplative Studies
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Study Summary
Hölzel, B. K., Brunsch, V., Gard, T., Greve, D. N., Koch, K., Sorg, C., … Milad, M. R. (2016). Mindfulness-Based Stress Reduction, Fear Conditioning, and The Uncinate Fasciculus: A Pilot Study. Frontiers in Behavioral Neuroscience, 10, 124. http://doi.org/10.3389/fnbeh.2016.00124
Abstract
Mindfulness has been suggested to impact emotional learning, but research on these processes is scarce. The classical fear conditioning/extinction/extinction retention paradigm is a well-known method for assessing emotional learning. The present study tested the impact of mindfulness training on fear conditioning and extinction memory and further investigated whether changes in white matter fiber tracts might support such changes. The uncinate fasciculus (UNC) was of particular interest in the context of emotional learning. In this pilot study, 46 healthy participants were quasi-randomized to a Mindfulness-Based Stress Reduction (MBSR,N = 23) or waitlist control (N = 23) group and underwent a two-day fear conditioning, extinction learning, and extinction memory protocol before and after the course or control period. Skin conductance response (SCR) data served to measure the physiological response during conditioning and extinction memory phases. Diffusion tensor imaging (DTI) data were analyzed with probabilistic tractography and analyzed for changes of fractional anisotropy in the UNC. During conditioning, participants were able to maintain a differential response to conditioned vs. not conditioned stimuli following the MBSR course (i.e., higher sensitivity to the conditioned stimuli), while controls dropped the response. Extinction memory results were not interpretable due to baseline differences. MBSR participants showed a significant increase in fractional anisotropy in the UNC, while controls did not (group by time interaction missed significance). Pre-post changes in UNC were correlated with changes in the response to the conditioned stimuli. The findings suggest effects of mindfulness practice on the maintenance of sensitivity of emotional responses and suggest underlying neural plasticity.
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4908122/
