PSYCH 3A03 Lecture Notes - Cochlear Nucleus, Microphonics, Vestibular System
5 Nov 2013
School
Department
Course
Professor
Document Summary
Ihc synaptically connected to all type i spiral ganglion neurons forming a radial afferent system going to cochlear nucleus. Lateral efferent system arises from small neurons in ipsilateral lateral superior olivary (lso) complex and brings feedback control to the ihc/type i afferent synapse. Ohc synaptically connected to a few small endings of type ii spiral ganglion neurons forming the spiral afferent system going to cochlear nucleus. Medial efferent system arises form large neurons from the both the ipsilateral and contralateral medial superior olivary (mso )complex. Type i (large, myelinated) spiral ganglion neurons have a single synaptic ending radially connected to ihc. The motions and interactions of various cochlear structures generate electric potentials. Cochlear electric potentials tell us how the ear works. An electrical potential is potential energy per unit of charge associated with a static (time-invariant) electric field. An electric potential is established whenever there is a concentration difference in charged ions between 2 regions (e. g. across a cell membrane)
