PSYCH261 Chapter Notes - Chapter 7: Scarpa'S Ganglion, Auditory Cortex, Vestibular Nerve
21 Feb 2017
School
Department
Course
Professor
Document Summary
Inner hair cells: transmit auditory information to the cns, have long, thick myelinated axons, form the bulk of synapses in the cochlear nerve ganglion. Outer hair cells: no role in hearing, they are effector cells that change the basillar membrane to alter the influences of vibration of inner hair cells. Auditor information travels from the cochlea along a branch of the auditory nerve called the cochlear nerve. Contains bipolar neurons, whose cell bodies are located in the cochlear nerve ganglion. Sends efferent axons to the superior olivary complex of the medulla. Internally, electrodes are implanted into the cochlea along the basillar membrane. Electrodes stimulate regions of the basillar membrane according to what pitch is interpreted by the external processor. The location stimulated on the basillar membrane can be interpreted by the brain. Place coding: the region on the basillar membrane stimulated by a sound wave corresponds to the frequency/pitch of that wave.
