Fine structure of cochlear innervation in the cat
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Cited by (72)
Effects of surgical lesions on choline acetyltransferase activity in the cat cochlea
2017, Hearing ResearchCitation Excerpt :In the cochlea, the LOC fibers have been shown to predominantly synapse with the type I afferent nerve fibers underneath the inner hair cells (IHC), whereas the MOC fibers primarily synapse on the bases of the outer hair cells (OHC). The LOC fibers form the inner spiral bundle and the tunnel spiral bundle under the inner hair cells of the organ of Corti of the cat (Ginzberg and Morest, 1984; Liberman et al., 1990). In the cat, the fiber population of the inner spiral bundle peaks in mid-cochlear regions; synapses per auditory nerve fiber peak in more apical parts, but the number of auditory nerve fibers decreases apically (Liberman et al., 1990).
A novel method for selectively labelling olivocochlear collaterals in the rat
2015, Hearing ResearchCitation Excerpt :MOC neurons, on the other hand, originate from the medial, ventral and rostral regions of the superior olivary complex (SOC) and project to the contralateral and ipsilateral cochlea. The thick myelinated axons of MOC neurons travel dorsomedially, form a tight bundle at the midline of the brainstem at the level of the floor of the fourth ventricle and eventually terminate on the outer hair cells (Ginzberg and Morest, 1984; Guinan et al., 1983; Liberman, 1980; Liberman and Brown., 1986; Warr and Guinan, 1979; White et al., 1983). Physiological evidence suggests that the MOC system could play an important role in auditory processing in enhancing the ability to respond to signals of interest in the presence of background noise (Guinan, 2011, 1996, 2006; Kawase et al., 1993; Robertson, 2009; Winslow and Sachs, 1987, 1988).
Neuroprostheses for restoring hearing loss
2015, Implantable Neuroprostheses for Restoring FunctionCochlear implants
2013, Handbook of Clinical NeurophysiologyCitation Excerpt :Within the organ of Corti each process typically forms a single synapse onto the closest IHCs (Spoendlin, 1978; Ginzberg and Morest, 1984; Liberman et al., 1990). The type II SGNs also pass through the habenula perforata, but then cross the floor of the organ of Corti and spiral basally for hundreds of microns before contacting multiple first, second and third row OHCs with en passant and terminal branchlets (Spoendin, 1969; Ginzberg and Morest, 1983, 1984). Hair cells of the organ of Corti are sensitive to many forms of damage including acoustic trauma, ototoxic drugs, congenital abnormalities and aging.
Connecting the ear to the brain: Molecular mechanisms of auditory circuit assembly
2011, Progress in NeurobiologyCitation Excerpt :Moreover, individual Type II spiral ganglion neurons contacting both IHCs and OHCs have been observed occasionally in cats (<2% of Type II neurons labeled) (Ginzberg and Morest, 1983; Perkins and Morest, 1975) and gerbils (one Type II neuron at P6) (Echteler, 1992). This evidence has supported the suggestion that all neurons initially make contact with both IHCs and OHCs, with no neurons fitting this description observed in the mature cochlea (Berglund and Ryugo, 1987; Ginzberg and Morest, 1984). Since intermediate morphologies are only seen transiently, the loss of projections is proposed to occur as a result of activity-dependent remodeling, similar to circuit refining mechanisms seen in other regions of the nervous system (Guido, 2008; Kandler et al., 2009).
Axodendritic and dendrodendritic synapses within outer spiral bundles in a human
2002, Hearing Research