PSY 805 Chapter 3 and 4: Stress and Coping Readings Week Two
14 Oct 2016
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Two branches of autonomic system include sympathetic (fight or flight, thoracic and lumbar regions of the spinal column) and para-sympathetic (relaxation and restoration responses, activated to shut down fight or flight reactions) Brain stem: responsible for vegetative functions (ex. Substantia nigra: within the midbrain, transmits important information to the basal ganglia, necessary for regulating voluntary movement. Diencephalon: lies above the midbrain, contains thalamus and hypothalamus: thalamus: amplifies signal of senses (ex. Endocrine system: system of organs and glands that secrete hormones into our bloodstreams that act as messengers to their respective target cells and organs; upon reaching these targets they regulate activity of the cells they affect. Sympathetic-adrenal-medulla axis (sam): primary system of fight or flight responses that involves the hypothalamus commanding the sympathetic nervous system to stimulate the adrenal medulla to secrete the catecholamines epinephrine and norepinephrine. Hypothalamus: primary command center for the endocrine"s stress respo(cid:374)se.
