An ultrastructural study of serially sectioned Renshaw cells. II. Synaptic types
1982; Elsevier BV; Volume: 246; Issue: 2 Linguagem: Inglês
10.1016/0006-8993(82)91166-0
ISSN1872-6240
AutoresPer‐Åke Lagerbäck, Lars‐Olof Ronnevi,
Tópico(s)Lipid Membrane Structure and Behavior
ResumoBoutons and synaptic contacts on 17 presumed Renshaw cells were studied ultrastructurally. All 17 neurons were postsynaptic to axon collateral boutons of intracellularly HRP-stained triceps surae α-motoneurons and located in lamina VII, ventromedially to the main motor nuclei. The boutons and synaptic contacts could be classified into two main categories on the basis of the synaptic vesicles: S-type boutons with spherical synaptic vesicles and F-type boutons with flattened vesicles, the α-motoraxon collateral boutons falling into the S-category. In addition, some S-type boutons containing neurofilaments and some being apposed by small presynaptic boutons were observed. The results are discussed in relation to earlier observations on the synaptology of central neurons, particularly spinal α-motoneurons.
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