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Cholinergic innervation of principal neurons in the cochlear nucleus of the Mongolian gerbil
dc.contributor.authorGillet, Charlène
dc.contributor.authorGoyer, David
dc.contributor.authorKurth, Stefanie
dc.contributor.authorGriebel, Hannah
dc.contributor.authorKuenzel, Thomas
dc.date.accessioned2018-05-15T20:14:30Z
dc.date.available2019-09-04T20:15:38Zen
dc.date.issued2018-07-01
dc.identifier.citationGillet, Charlène ; Goyer, David; Kurth, Stefanie; Griebel, Hannah; Kuenzel, Thomas (2018). "Cholinergic innervation of principal neurons in the cochlear nucleus of the Mongolian gerbil." Journal of Comparative Neurology 526(10): 1647-1661.
dc.identifier.issn0021-9967
dc.identifier.issn1096-9861
dc.identifier.urihttps://hdl.handle.net/2027.42/143700
dc.description.abstractPrincipal neurons in the ventral cochlear nucleus (VCN) receive powerful ascending excitation and pass on the auditory information with exquisite temporal fidelity. Despite being dominated by ascending inputs, the VCN also receives descending cholinergic connections from olivocochlear neurons and from higher regions in the pontomesencephalic tegmentum. In Mongolian gerbils, acetylcholine acts as an excitatory and modulatory neurotransmitter on VCN neurons, but the anatomical structure of cholinergic innervation of gerbil VCN is not well described. We applied fluorescent immunohistochemical staining to elucidate the development and the cellular localization of presynaptic and postsynaptic components of the cholinergic system in the VCN of the Mongolian gerbil. We found that cholinergic fibers (stained with antibodies against the vesicular acetylcholine transporter) were present before hearing onset at P5, but innervation density increased in animals after P10. Early in development cholinergic fibers invaded the VCN from the medial side, spread along the perimeter and finally innervated all parts of the nucleus only after the onset of hearing. Cholinergic fibers ran in a rostro‐caudal direction within the nucleus and formed en‐passant swellings in the neuropil between principal neurons. Nicotinic and muscarinic receptors were expressed differentially in the VCN, with nicotinic receptors being mostly expressed in dendritic areas while muscarinic receptors were located predominantly in somatic membranes. These anatomical data support physiological indications that cholinergic innervation plays a role in modulating information processing in the cochlear nucleus.Using fluorescent staining techniques, the authors show that cholinergic axons innervate mainly dendritic areas of time‐coding neurons in the cochlear nucleus of hearing Mongolian gerbils. This study elucidates the anatomical basis of descending modulatory connectivity of a lower sensory brain area.
dc.publisherWiley Periodicals, Inc.
dc.subject.otherRRID:AB_2080193
dc.subject.otherRRID:AB_2039997
dc.subject.otherRRID:AB_2315385
dc.subject.otheracetylcholine
dc.subject.othercochlear nucleus
dc.subject.otherolivocochlear system
dc.subject.otherendbulb of held
dc.subject.otherspherical bushy cells
dc.subject.otherRRID:AB_887864
dc.subject.otherRRID:AB_2079760
dc.subject.otherRRID:AB_90764
dc.titleCholinergic innervation of principal neurons in the cochlear nucleus of the Mongolian gerbil
dc.typeArticleen_US
dc.rights.robotsIndexNoFollow
dc.subject.hlbsecondlevelEcology and Evolutionary Biology
dc.subject.hlbtoplevelScience
dc.description.peerreviewedPeer Reviewed
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/143700/1/cne24433.pdf
dc.description.bitstreamurlhttps://deepblue.lib.umich.edu/bitstream/2027.42/143700/2/cne24433_am.pdf
dc.identifier.doi10.1002/cne.24433
dc.identifier.sourceJournal of Comparative Neurology
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dc.owningcollnameInterdisciplinary and Peer-Reviewed


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