Electron Microscopic Examination of the Cat Oculomotor Nucleus Innervating the Medial Rectus Muscle
Journal of the Korean Ophthalmological Society
; : 1231-1236, 1998.
Article
em Ko
| WPRIM
| ID: wpr-96107
Biblioteca responsável:
WPRO
ABSTRACT
Oculoinotor nerve is a very important nerve in the ophthalornology, innervating the medial rectus, inferior rectus, inferior oblique, superior rectus, levator palpebrae superioris, and the presynaptic parasyrnpathetic outflow to the internal muscles of eye (the ciliary muscle and the sphincter muscle of the iris) . To examine the fine structure of neurons and synapses in the oculomotor nucleus projecting the rnedial rectus Hiuscle, 50% horseradish peroxidase (HRP) solution was injected into the rnedial rectus rnuscle of the cat, and serial sections of midbrain were studied with electron microscopes. Large motor neuron, small motor neuron and spindleshape motor neuron were examined. Cell body contained rich organells that. were nucleus, rough endoplasmic reticulum, HRP containing lysosorne, mitochondria and ribosome etc. Three kinds of synapses that are axosomatic synapse, axo-dendritic synapse and axo-axonic synapse were examed. Moreover, the nerve terminals had spherical-shaped synaptic vesicles. These results suggest that the function of inotorneurons related to the medial rectus muscle is not. defined by the shape and distribution of nerve terrninals but. depends on the shape of synaptic vesicles.
Palavras-chave
Texto completo:
1
Base de dados:
WPRIM
Assunto principal:
Ribossomos
/
Sinapses
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Vesículas Sinápticas
/
Mesencéfalo
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Retículo Endoplasmático Rugoso
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Peroxidase do Rábano Silvestre
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Mitocôndrias
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Neurônios Motores
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Músculos
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Neurônios
Limite:
Animals
Idioma:
Ko
Revista:
Journal of the Korean Ophthalmological Society
Ano de publicação:
1998
Tipo de documento:
Article