PSYC 212 Lecture Notes - Lecture 5: Ganglion, Wilder Penfield, The Motor
14 Sep 2017
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How do you connect with real friends? (a handshake, a kiss) Why is touch so pleasurable (sensually and sexually pleasurable) Somatosensory perception is basically pressure sensation false. Skin indention somewhere on the body, a skin indentation at some point in time, sodium channels opening, a spatio-temporal pattern of indetation and action potentials. Two objects can be applied at the same pressure, but result in different percpets. Does rubbing your hand over a rock result in the same pattern of pressure change as rubbing our hand. Measure the spacing needed between two points to be discriminated. Psychophysical measures of skin sensitivity and acuity method of constant stimuli (best method to measure) Moisturize your skin and scrub dead skin off your fingers. Second graph shows when only something is changed (stops responding fast adapting) You record action potentials from what seems like a fast-adapting mechanoreceptor. You only get action potentials when you stimulate the tip of the index finger.
