BCS 240 Lecture Notes - Lecture 23: Tectorial Membrane, Basilar Membrane, Middle Ear
30 Oct 2018
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10:18 am functions of the auditory system: localize sounds in space identify sounds. Fourier analysis mathema(cid:415)cally breaking down a natural sound into its component sine waves analogous to how the auditory system analyzes sounds. K+ enters the hair cells to depolarize them when the tops of the stereocilia get closer together (tip links go slack), ion channels slam shut. Exam 3 page 1 go slack), ion channels slam shut. Path to cortex: most structures of the auditory system are arranged according to frequency (creating a tonotopic map) what pitch percep(cid:415)on (spacing between frequencies) occurs in the region anterior to a1 inputs are compared to previously experienced and identified pitches. Information streams: posterior (dorsal) stream carries where informa(cid:415)on from the superior olive to posterior parietal cortex anterior (ventral) stream carries what informa(cid:415)on from the pitch area to prefrontal cortex. Wernicke"s aphasia inability to comprehend speech (s(cid:415)ll able to produce speech)
