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Central projection of the peripheral cochlear nerve from each turn to the cochlear nuclei in the Mongolian gerbil

Authors
 Hong Joon Park  ;  Hee Nam Kim 
Citation
 YONSEI MEDICAL JOURNAL, Vol.36(2) : 111-115, 1995-06 
Journal Title
YONSEI MEDICAL JOURNAL
ISSN
 0513-5796 
Issue Date
1995-06
MeSH
Animals ; Cochlear Nerve / anatomy & histology* ; Cochlear Nucleus / anatomy & histology* ; Gerbillinae ; Horseradish Peroxidase ; Nerve Fibers
Keywords
Cochlea ; tonotopy ; HRP ; gerbil
Abstract
The central projections of the peripheral cochlear nerve fiber from each turn to the cochlear nuclei (CN) in the mongolian gerbil were investigated using retrograde transportation of horseradish peroxidase (HRP). The organ of Corti and the osseous spiral lamina were scratched with an electrolytically-sharpened fine needle via a small hole at each turn of the cochlea. The cochlea was filled with a 30% horseradish peroxidase (HRP) solution. After 48 hours, 50 microns transverse serial sections of the brainstem were made with a vibratome. The tissue was processed with the diaminobenzidine procedure of the cobalt-glucose method. Our experiment revealed that the fibers from the basal turn terminated at the dorsomedial portion of anteroventral cochlear nuclei (AVCN), but those from the apical turn were distributed among the ventrolateral portion of the AVCN. In the posteroventral cochlear nuclei (PVCN) and dorsal cochlear nuclei (DCN), the fibers from basal to apical turns extend from the dorsal to the ventral portion of each nuclei. A distinct tonotopic arrangement could be found between the origin of cochlear fibers of each turn and their termination in the regions of the cochlear nuclei (CN). Also, the results suggested that the scratch method combined with retrograde transportation of horseradish peroxidase was useful in investigating the tonotopic arrangement of the peripheral auditory nerve in the CN.
Files in This Item:
T199502053.pdf Download
DOI
10.3349/ymj.1995.36.2.111
Appears in Collections:
1. College of Medicine (의과대학) > Dept. of Otorhinolaryngology (이비인후과학교실) > 1. Journal Papers
Yonsei Authors
Kim, Hee Nam(김희남)
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/186614
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