Stress reduction correlates with structural changes in the amygdala.
Social Cognitive and Affective Neuroscience March 1, 2010 Britta K. Hölzel, James Carmody, Karleyton C Evans et al.
Reductions in perceived stress after an 8-week mindfulness-based stress reduction intervention correlate with decreases in gray matter density in the right basolateral amygdala. Stressed but otherwise healthy individuals (N = 26) reported significantly less perceived stress after the intervention. The study demonstrates that neuroplastic changes are associated with improvements in a psychological state variable, not just with learning abstract information or motor and language skills.