Further studies on the cyto-, fibro- and dendro-architectonic structures of chicken diencephalon and mesencephalon.
Cyto-, fibro- and dendro-architectonic analyses of the diencephalic and mesencephalic area in chickens were carried out by means of the Nissl staining, silver impregnation and Golgi-Cox techniques. Within this area, a number of nuclei and fiber bundles were described and summarized in the form of cyto- and fibro-architectonic atlases of the frontal planes at the same level. Furthermore, with special reference to the optic tectum, detailed cyto- and dendro-architectonic observations were performed. Cytoarchitectonically, this area was composed of 15 alternately arranged layers from the surface inward, 3 of which were fiber bundle zones demonstrated more clearly in silver-impregnated preparations. On the other hand, in dendro-architectonic preparations, only 4 zones were identified; external horizontal, external vertical, internal horizontal and internal vertical cell layers. Among them, small fusiform and large pyramidal cell types in the external vertical cell layer as well as large stellate cells in the internal horizontal zone were histologically characterized. Further means of performing more detailed architectonic analysis of all nuclei and fiber bundles in the diencephalic and mesencephalic area were discussed and this may be useful for the physiological and anatomical studies.
Yamauchi
K
K
Laboratory of Animal Science, Faculty of Agriculture, Kagawa University, Japan.
Yasuda
M
M
D000818:Animals; D002645:Chickens / Q000033:anatomy & histology*; D004027:Diencephalon / Q000033:anatomy & histology*; D005260:Female; D008297:Male; D008636:Mesencephalon / Q000033:anatomy & histology*