PSY 3301 Lecture Notes - Lecture 7: Cochlear Implant, Middle Temporal Gyrus, Basilar Membrane
19 Jan 2016
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Document Summary
Similar, sound waves are coming into the ear that are being converted into neural activity. 3 parts to an ear: external ear, middle, and inner. Sound waves comes from the external, hit the middle bones and eventually reach inner ear where it is converted. Organ or corti coiled up where the auditory sensory cells responsible for hearing. Bottom hair cells are attached to basilar membrane. Sound waves come in, move stereocilia back and forth, that causes outer hair cells to activate inner hair cells (change the membrane potential/voltage on sensory receptors) Causes a shearing force causes graded potentials and the inner hair cells make action potentials. Important cochlea unraveled, see the parts of it are different. Narrow, thick base is tuned for high frequencies. A wide, thin apex is turned for low frequencies. Sound waves at medium frequencies cause peak bending o the basilar membrane at this point.
