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Projection of the cochlear nuclei on the inferior colliculus in the cat
Author(s) -
Osen Kirsten Kjelsberg
Publication year - 1972
Publication title -
journal of comparative neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.855
H-Index - 209
eISSN - 1096-9861
pISSN - 0021-9967
DOI - 10.1002/cne.901440307
Subject(s) - inferior colliculus , anatomy , inferior colliculi , biology , superior colliculus , neuroscience , dorsal cochlear nucleus , nucleus , nissl body , cochlear nucleus , staining , genetics
The present study was carried out in order to define the topographical organization and the cells of origin of the second order auditory fibers terminating in the inferior colliculus. The findings are based on anterograde fiber degeneration studies in Nauta preparations of adult cats following stereotactical lesions of the cochlear nuclei, and on retrograde cell degeneration studies in Nissl sections of kittens following transection of the ascending auditory fiber tracts. Both the dorsal and ventral cochlear nuclei were found to contribute fibers to the central nucleus of the contralateral inferior colliculus in a definite topographical order supporting the tonotopical organization of the inferior colliculus revealed physiologically by Rose, Greenwood, Goldberg and Hind (′63). The fibers leading to the inferior colliculus from the dorsal cochlear nucleus, undoubtedly originate in the pyramidal cells, while no definite conclusions could be drawn regarding the cells of origin of fibers derived from the ventral cochlear nucleus.