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Ultrastructure of the anterior ventral and anterior medial nuclei of the cat thalamus.
- Source :
- Experimental Brain Research; 1978, Vol. 31 Issue 3, p417-431, 15p
- Publication Year :
- 1978
-
Abstract
- Electron microscopical studies of the thalamic AV-AM nuclei substantiated the presence of two main types of neurons, i.e. principal (or relay) cells and Golgi type II interneurons. Characteristic synaptic islands are found in abundance in the AV-AM. Four different types of synaptic terminals have been identified in these islands: RL-boutons = large axonal terminals with round synaptic vesicles; RS-boutons = small axonal terminals with round synaptic vesicles; F-boutons = small axonal profiles containing flattened synaptic vesicles, and F-profiles interpreted as presynaptic dendrite appendages, bearing pleomorphic vesicles, both belonging to the Golgi type II interneurons. - The synaptic relations were studied in normal preparations and after lesions in the mamillary body, limbic cortex and hippocampus. The specific afferents (RL-boutons) - originating from the medial mamillary nucleus - are presynaptic to both relay cell dendrites and 'presynaptic' dendrite profiles of Golgi type II interneurons, which in turn are presynaptic to the same relay dendrites (synaptic triads). RS-boutons originate mainly from limbic cortex and hippocampus. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00144819
- Volume :
- 31
- Issue :
- 3
- Database :
- Complementary Index
- Journal :
- Experimental Brain Research
- Publication Type :
- Academic Journal
- Accession number :
- 71124010
- Full Text :
- https://doi.org/10.1007/BF00237299