PSY 111 Lecture Notes - Lecture 8: Cochlea, Umami, Olfactory System
20 Nov 2020
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Document Summary
Outer ear: consists of pinna that collet s and funnels sounds. Middle ear: chamber between eardrum and cochlea containing three tiny bones (hammer, anvil, stirrup0. Place theory suggest that different sound waves stimulate the basilar membrane at different specific places resulting in previewed pitch. Conduction hearing impairment: sound vibrations cannot be passed front be eardrum to the cochlea. Caused by damage to the mechanical system that conducts sound waves to the cochlea. Ear drum punctured or tiny bones in middle ear cannot vibrate. Nerve hearing impairment: problem lines in inner ear or in the auditory pathway and cortical areas of the brain. Caused by the damage to the cochlea"s hair cells or to the auditory nerve, also called nerve deafness. Older people tend to hear low frequencies well but suffer hearing loss for higher frequencies. The gustatory (taste) receptors are clustered of cells found on the taste bud, which are responsible for the sense of taste.
