CREST SYNAPSES IN THE SUBSTANTIA GELATINOSA OF THE RAT SPINAL CORD
- VernacularTitle:大白鼠脊髓胶状质内的嵴突触
- Author:
Changgeng ZHU
- Publication Type:Journal Article
- From:
Acta Anatomica Sinica
1953;0(01):-
- CountryChina
- Language:Chinese
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Abstract:
Crest synapses of the substantia gelatinosa have been observed in rat spinal cord by means of electron microscopy. They associate with axe-dendritic or dendrodendritic junctions in this study. The postsynaptic elements come from clubbed finger-like dendritic crest which is characterized by prominent postsynaptic membrane thickening, subjunctional bodies and longer active zone. Two presynaptic terminals contact the wall of crest process side by side and contain complex vesicles: spheric vesicles (40～60 nm in diameter), flat vesicles (75?25 nm), medium-sized granular vesicles (about 70 nm) and large granular vesicles (about 125 nm).Crest synapses differ from spine synapses with respect to that they typically contain two junctions, one on each side of the middle part of the crest and that the postsynaptic boutons are always provided with sub junctional bodies.
