PSYCH 9A Lecture Notes - Lecture 23: Oval Window, Basilar Membrane, Middle Ear
14 Jun 2016
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Document Summary
Chapter 4 sensation: from sound waves to hearing, gathering the sound waves know the order for the final!! Cochlea: coiled structure in the inner ear that contains the basilar membrane, snail structured. To reach the cochlea, sound has to travel a complicated path. Hair cells: the auditory receptors in the cochlea, lodged between the basilar membrane and other membrane above, transducer. Motion of the oval window produces pressure changes in the cochlear fluid that lead to vibrations of the basilar membrane. As basilar membrane vibrates, its deformations bend the hair cells; this bending causes triggering neural response. Sound waves arriving at ear is caused by basilar membrane vibrate not in uniform. Higher frequencies, the region of greatest movement is at the end of basilar membrane closer to oval window, Lower frequencies occur closer to the cochlear tip. Low pitched sound: the firing of these cells is synchronized with the peaks of the incoming sound waves.
