PSYCH261 Study Guide - Midterm Guide: Sleep Disorder, Carbamazepine, Hamilton Rating Scale For Depression
6 Nov 2017
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Module 6. 2 somatosensation: somatosensory system the sensation of the body and its movement. Not just one sense but many, including: discriminative touch (which identifies the shape of an object), deep pressure, cold, warmth, pain, itch, tickle and the position and movement of joins. Somatosensory receptors: somatosensory receptors and probable functions. Free nerve ending (unmyelinated or thinly myelinated axons) Near base of hairs and elsewhere in skin. Mostly or entirely in hairless areas, perhaps including genitals. Sudden displacement of skin; low- frequency vibration (flutter) * deep stimulation, joint movement, muscle movement not included: a touch receptor may be a simple bare neuron ending (ex. If someone gently strokes your skin: on average, women can detect grooves about 1. 4mm apart, whereas men need the grooves to be about 1. 6mm apart (*this is because women have smaller fingers) Information from touch receptors in the head enters cns through cranial nerves.
