ELECTRON MICROSCOPIC STUDY OF COMMISSURAL AXON TERMINALS IN CAT MOTOR CORTEX
- VernacularTitle:猫运动皮层内联合纤维末梢的电镜观察
- Author:
Xiaobo LIU
;
Zehui ZHENG
- Publication Type:Journal Article
- Keywords:
Cat motor cortex;
Commissural terminals;
Anterograde degeneration;
Electron microscopy
- From:
Acta Anatomica Sinica
1954;0(02):-
- CountryChina
- Language:Chinese
-
Abstract:
Synaptic connections of commissural axon terminals from contralateral motor cortex have been studied by using anterograde degeneration and electron microscopy in the cortical area 4? of cat. The results showed that most of the commissural terminals display electron-dense type degeneration, and 92 degenerating terminals were identified in area 4?. The number of terminals in layer Ⅰ was nearly equal to layer Ⅲ. In layer Ⅲ, an asymmetrical synapse formed between a degenerating terminal and the soma of a bipolar cell was observed. In layers Ⅴ-Ⅵ, no degenerating terminal could be found. Among the total degenerating terminals, 77.2% were found to make synapses with dendritic spines, 21.7% made synapses with dendritic shafts and 1.1% with soma, and all of these synapses were of the assymmetrical type.
