Physiology research shows that the stress response memory lives in your nervous system. Take for example exposure to a stressful event. One in which you felt helpless, hopeless, and lacked control. In this case your autonomic nervous system (ANS) is engaged. This is the part of the nervous system responsible for controlling unconscious bodily actions like breathing. To be more specific, it was the sympathetic branch (fight or flight) of the ANS that kicked in while you were strained. In addition, the hypothalamic-pituitary-adrenal axis of the midbrain began firing. In which a signal from your hypothalamus sends a hormonal message to your pituitary gland that stimulates to your adrenal glands...read more>>>...