Neural correlates of mindfulness meditation-related anxiety relief

Mindfulness meditation reduces anxiety by engaging brain regions that regulate emotion and self-referential thought. In fifteen healthy novice meditators, four days of training lowered state anxiety during meditation sessions but not during a simple breath-attention task. Anxiety relief correlated with increased activity in the anterior cingulate cortex, ventromedial prefrontal cortex, and anterior insula. Greater default-mode activity in the posterior cingulate cortex during meditation was linked to higher anxiety, suggesting difficulty controlling self-referential thoughts. The findings indicate that mindfulness meditation attenuates anxiety through mechanisms involved in regulating self-referential thought processes.

Study at a glance

Abstract

Anxiety is the cognitive state related to the inability to control emotional responses to perceived threats. Anxiety is inversely related to brain activity associated with the cognitive regulation of emotions. Mindfulness meditation has been found to regulate anxiety. However, the brain mechanisms involved in meditation-related anxiety relief are largely unknown. We employed pulsed arterial spin labeling MRI to compare the effects of distraction in the form of attending to the breath (ATB; before meditation training) to mindfulness meditation (after meditation training) on state anxiety across the same subjects. Fifteen healthy subjects, with no prior meditation experience, participated in 4 d of mindfulness meditation training. ATB did not reduce state anxiety, but state anxiety was significantly reduced in every session that subjects meditated. Meditation-related anxiety relief was associated with activation of the anterior cingulate cortex, ventromedial prefrontal cortex and anterior insula. Meditation-related activation in these regions exhibited a strong relationship to anxiety relief when compared to ATB. During meditation, those who exhibited greater default-related activity (i.e. posterior cingulate cortex) reported greater anxiety, possibly reflecting an inability to control self-referential thoughts. These findings provide evidence that mindfulness meditation attenuates anxiety through mechanisms involved in the regulation of self-referential thought processes.