A study performed at Stanford found that an 8-week mindfulness course reduced the reactivity of the amygdala and increased activity in areas of the prefrontal cortex that help regulate emotions, subsequently reducing stress. Researchers from Harvard discovered corresponding changes in the physical structure of the brain with a similar meditation course; there was a lower density of neurons in the amygdala and greater density of neurons in areas involved in emotional control providing a realistic and maintainable stress management technique.