How posture and movement is connected to mood and stress : TED Radio Hour : NPR

It might not just be in your head. It all comes down to the inner part of our adrenal glands—the adrenal medulla—which releases adrenaline into the body, says Peter Strick, a leading neuroscientist at the University of Pittsburgh. "So we injected the adrenal medulla with a virus, and we traced it back into the brain all the way to the cerebral cortex and then mapped which cortical areas influenced the adrenal," he says. Sponsor Message Think of it as a three-way conversation between your core muscles, adrenal glands, and brain — all talking to one another and influencing your mental wellbeing. "The muscles that control posture, our core muscles, have an impact on an organ that is involved in stress."