PSY 3306 Lecture Notes - Lecture 7: Nociceptor, Exosphere, Posterior Grey Column
9 Apr 2018
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Chronic pain persisted beyond the normal expected healing period. Often defined as pain lasting at least 3 6 months. Iasp defi(cid:374)e pai(cid:374) as (cid:858)a(cid:374) u(cid:374)pleasa(cid:374)t se(cid:374)sor(cid:455) a(cid:374)d e(cid:373)otio(cid:374)al e(cid:454)perie(cid:374)(cid:272)e asso(cid:272)iated with a(cid:272)tual or pote(cid:374)tial da(cid:373)age, or des(cid:272)ri(cid:271)ed i(cid:374) ter(cid:373)s of su(cid:272)h da(cid:373)age. (cid:859) this defi(cid:374)itio(cid:374) stresses the psychological nature of pain. Nociception the processing of stimuli associated with the stimulation of nociceptors and has the potential of being experienced as pain. Patie(cid:374)ts with (cid:272)hro(cid:374)i(cid:272) pai(cid:374) are at risk for depressio(cid:374). It(cid:859)s also asso(cid:272)iated with other psychological conditions such as anxiety, substance abuse. Social consequences: disruption of social relationships, social isolation, reduced quality of life. Specificity theory proposed by descartes; one-to-one correspondence between pain and tissue damage (the greater the tissue damage, the greater the pai(cid:374)). Melzack and wall gate control theory nerve impulses are transmitted from afferent fibers to spinal cord transmission cells modulated by a gating mechanism in the dorsal horn of the spinal cord.
