Lecture 4 - Sensory Mechanisms-Updated

Hhmiorgbiointerac6vemediacochlealgmov 22

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Unformatted text preview: nd audi6on •  The fluid vibra6ons within the cochlear canals induce mo6ons of the basilar membrane rela6ve to the tectorial membrane (which does not move), bending the stereocilia of the hair cells back and forth in localized regions of the cochlea •  Bending of the stereocilia s6mulates them to release excitatory neurotransmiiers that cause postsynap6c neurons to fire ac6on poten6als •  These are sensed as sound by neuronal networks in the auditory cortex, the area of the brain that processes sound. 18 Mechanorecep6on and audi6on •  Hair bending in one direc6on releases neurotransmiier that fires an ac6on poten6al in postsynap6c neuron •  Hair bending in the other direc6on shuts off neurotransmiier release 19 Mechanorecep6on and audi6on •  We don’t have receptors that recognize all wavelengths 20 Mechanorecep6on and audi6on 21 Mechanorecep6on and audi6on hip://media.hhmi.org/biointerac6ve/media/cochlea...
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