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Functional differentiations of the lateral geniculate nucleus. Yutaka FUKUDA 1 , Hajime SAWAI 1 , Katsuko MORIGIWA 1 , Kazuo WAKAKUWA 1 1Department of Neurophysiology, Institute of Higher Nervous Activity, Osaka University Medical School pp.411-428
Published Date 1988/6/10
DOI https://doi.org/10.11477/mf.1431906196
  • Abstract
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We first reviewed recent studies on the functional differentiations of the retinal ganglion cells and of corresponding geniculate relay cells and their relation to the laminar segregation of the dorsal lateral geniculate nucleus (LGNd). In some animals such as the cat, monkey and galago, the LGNd laminae are stratified with respect to Y, X and W cells or their homologue retinal inputs. A similar but less clear trend is found in the LGNds of the chipmunk and the rat. By contrast, in the tree shrew, mink and ferret, their laminae are stratified with respect to ON-center or OFF-center type retinal inputs. These laminar segregations of Y/X/W or ON-center/OFF-center cells are not, however, mutually exclusive in most animals. For example, indistinctly segregated distribution of ON- and OFF-center relay cells was noted within the laminae of the cat and in neighboring laminae of the monkey. On the other hand, certain laminae in the tree shrew and mink LGNds appear to be innervated mainly by W-like cells and others by Y-like or X-like cells, although physiological evidence is still lacking.


Copyright © 1988, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1243 印刷版ISSN 0001-8724 医学書院

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