PSYC 2510 Lecture Notes - Stim, David H. Hubel, Depth Perception
2 May 2013
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Document Summary
Sensation: process where a stimulus excites a receptor which changes info. into a neural message. Perception: selection, organization and interpretation of a sensory experience. Accessory structures: sense receptors- transduction, conversion of physical energy into neural activity. Coding: translating physical properties into patterns of neural activity. Different sensory systems signals received by sense organs stimulate different nerve pathways to different areas of the brain. Synesthesia: stimulation of one sense evokes another. Nabokov complained to his mother: red a" block should be blue he sensed the letter a to be blue. Can see numbers and letters in terms of colour and sounds. Accessory structures: from pinna (outer ear) to cochlea (inner ear) & organ of corti. Transduction: hair cells (cilia) on basilar membrane (cochlea floor) bend as fluid movies signal to auditory nerve. Coding of waves: amplitude = loudness (decibels, length (frequency) = pitch (hertz, purity = timbre (flute to oboe) Coding: salty, sour, bitter, sweet, umami savoury.
