THE SYNAPTOLOGY OF THE SPINAL BORDER CELLS——THE ORIGINAL NEURONS OF VENTRAL SPINOCEREBELLAR TRACT IN THE RAT: AN ELECTRON MICROSCOPIC STUDY
- VernacularTitle:大鼠脊髓小脑前束起始细胞——脊髓边缘细胞突触形态学的电镜研究
- Author:
Jinlu ZHANG
;
Qunyuan XU
;
Cuntian YANG
;
Yingjin LUO
;
Chunli ZHAO
;
Nan LI
- Publication Type:Journal Article
- Keywords:
Synaptology;
Spinal border cells;
Electron microscopy;
HRP;
Rat
- From:
Acta Anatomica Sinica
1957;0(04):-
- CountryChina
- Language:Chinese
-
Abstract:
Following injection of HRP into the cerebellum of the rat, the retrogradely labeled′spinal border cells′ in L_1-L_3 of the spinal cord were examined electron microscopically for understanding the synaptology. Six types of terminal boutons (S, F, Cf, T, G and P types) which terminated on the surface of cell bodies or dendrites of the spinal border cells were recognized. The S- and F-boutons contain spherical and elliptical vesicles respectively. These two types of boutons had relatively broad area contacting with the surface of either cell bodies or dendrites. They could be derided into two sub-types respectively. One was the elonagted giant bouton and the other was the round. Cf-type contain flattened vesicles and it make membraneous′contact′ lacking in specialized pre-and postsynaptic membrane thickenings. T-type contain spherical and large granular vesicles, and dense body was seen beneath the post synaptic membrane. G-type boutons contain large granular vesicles in area of presynaptic. P-type boutons form synapses upon the large S-type boutons and contain pleomorphic vesicles. The postsynaptic membrane of S-, T- and G-types is apparently thicker than the presynaptic membrane and showed to be asymmetrical. Further study is necessary with regard to the sources of different terminal boutons contacting with different portions of the spinal border cells.
