PSYCH 3M03 Study Guide - Final Guide: Human Sexuality, Promiscuity, Insomnia
14 Dec 2015
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Document Summary
Motivation to seek comfort in reaction to excess heat or cold (seek homeostatic. Autonomic and endocrine responses condition: temperature sensed by cutaneous receptors, information integrated with hypothalamic temperature-sensitive neurons. Posterior nucleus of hypothalamus: increased sympathetic nervous system activation, shivering, piloerection, vasoconstriction. Anterior pituitary: stimulates increased thyroid hormone secretion. Anterior (pre-optic) nucleus of hypothalamus: decreased sympathetic nervous system activation, sweating, panting, thirst, vasodilation. Anterior pituitary: decreased thyroid hormone secretion. Behavioural drive to escape and avoid environments that are too hot or too cold. Motivates us to avoid things that can harm us: disincentive for maladaptive and self-injurious behaviors. Punishes activity when rest and recovery are needed. Pain perception is often not proportional to injury: ex. Legs blown off in battle don"t notice until you look down: ex. Hard wiring in pain receptors (innate: still great subjective variation in sense of pain, puzzling. Signal from receptors spinal cord (fibers) synapse. Receptors (nociceptors: free nerve endings, mechanical and thermal stimuli.
