PSY346H5 Study Guide - Midterm Guide: 21 Days, Spatial Memory, Antacid
Document Summary
There are generally 2 stress responses: the sympathetic fight-or-flight response originally described by cannon, the hypothalamic-pituitary-adrenal (hpa) axis response described by seyle. Both systems are designed to help the body mobilize adequate resources to be able to defend itself in an acute stress response. When stress response enters the chronic phase, the body and brain face numerous health risks: autonomic stress response (the sympathetic fight-or-flight response) Walther cannon- described neuroanatomical circuit underlying the stress response in 1914 and described what the role this sympathetic nervous system plays in reestablishing physiological homeostasis. He noted the secretion of epi and ne from adrenal medulla and sympathetic nerves respectively, enables an animal to mobilize its forces to survive a treat. This response was mediated by the sympathetic arm of the autonomic system. He viewed stress from the homeostatic perspective ( view that the autonomic nervous system controls various components of the body that maintains homeostasis, incl. temp, body ph and oxygen level)
