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Titolo:
EFFERENT SYNAPTIC ORGANIZATION OF THE OLIVARY PRETECTAL NUCLEUS IN THE ALBINO-RAT - AN ULTRASTRUCTURAL TRACING STUDY
Autore:
KLOOSTER J; VRENSEN GFJM; VANDERWANT JJL;
Indirizzi:
NETHERLANDS OPHTHALM RES INST,DEPT MORPHOL,POB 12141 1100 AC AMSTERDAM NETHERLANDS
Titolo Testata:
Brain research
fascicolo: 1-2, volume: 688, anno: 1995,
pagine: 47 - 55
SICI:
0006-8993(1995)688:1-2<47:ESOOTO>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
MEDIAL TERMINAL NUCLEUS; PUPILLARY LIGHT REFLEX; OPTIC TRACT; CAT; IMMUNOREACTIVITY; DARKSCHEWITSCH; LUMINANCE; DETECTORS; RABBITS; NEURONS;
Keywords:
OLIVARY PRETECTAL NUCLEUS; EFFERENT; ELECTRON MICROSCOPY; PHASEOLUS VULGARIS LEUKOAGGLUTININ; PUPILLARY LIGHT REFLEX;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
20
Recensione:
Indirizzi per estratti:
Citazione:
J. Klooster et al., "EFFERENT SYNAPTIC ORGANIZATION OF THE OLIVARY PRETECTAL NUCLEUS IN THE ALBINO-RAT - AN ULTRASTRUCTURAL TRACING STUDY", Brain research, 688(1-2), 1995, pp. 47-55

Abstract

In this study an ultrastructural analysis was made of the efferent projections of the olivary pretectal nucleus in the rat. The anterogradetracer Phaseolus vulgaris leucoagglutinin was injected iontophoretically into the olivary pretectal nucleus. Ascending and descending pathways were studied. In the descending pathway special attention was paidto the fine structural features of the olivary pretectal nucleus efferents projecting to the Edinger-Westphal nucleus, the interstitial nucleus of Cajal, the nucleus of Darkschewitsch and the periaqueductal gray. The projection to the superior colliculus and the pontine nucleus was also studied at the ultrastructural level. All the labeled terminals in the descending pathway showed ultrastructurally similar features: clear, round vesicles and electron dense mitochondria. The terminalsmade asymmetric synaptic membrane specializations (Gray type I), the postsynaptic profiles were dendritic. In the interstitial nucleus of Cajal and the superior colliculus the terminals are organized in glomerulus-like structures. The terminals in the descending pathway were enwrapped by astrocytic processes, also in the glomerulus-like structures. In the ascending pathway the projection to the ventral part of the lateral geniculate nucleus was studied. Almost all terminals in the ascending pathway showed similar ultrastructural features as in the descending pathway: electron dense mitochondria, clear, round vesicles and asymmetric synaptic membrane specializations (Gray type I). The terminals are organized in glomerulus-like structures. To identify the projecting neurons in the interstitial nucleus of Cajal and the Edinger-Westphal nucleus, retrograde tracing experiments were performed. Therefore the beta subunit of cholera toxin conjugated with horseradish peroxidase was injected into the facial nucleus. Fusiform labeled neurons inthe Edinger-Westphal nucleus and large labeled multipolar neurons in the interstitial nucleus of Cajal were found. Labeling was observed inlysosomes and in the Golgi fields of the cells. The neurons in the interstitial nucleus of Cajal have large cell bodies with well-developedGolgi fields and show extensive fields of rough endoplasmic reticulum.

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Documento generato il 14/08/20 alle ore 16:21:54