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Titolo:
DUAL MORPHOLOGY AND TOPOGRAPHY OF THE CORTICOTHALAMIC TERMINALS ORIGINATING FROM THE PRIMARY, SUPPLEMENTARY MOTOR, AND DORSAL PREMOTOR CORTICAL AREAS IN MACAQUE MONKEYS
Autore:
ROUILLER EM; TANNE J; MORET V; KERMADI I; BOUSSAOUD D; WELKER E;
Indirizzi:
UNIV FRIBOURG,INST PHYSIOL,RUE MUSEE 5 CH-1700 FRIBOURG SWITZERLAND INSERM,U94 F-69500 BRON FRANCE UNIV LAUSANNE,INST CELLULAR BIOL & MORPHOL CH-1005 LAUSANNE SWITZERLAND
Titolo Testata:
Journal of comparative neurology
fascicolo: 2, volume: 396, anno: 1998,
pagine: 169 - 185
SICI:
0021-9967(1998)396:2<169:DMATOT>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
SQUIRREL SCIURUS-CAROLINENSIS; LEUKOAGGLUTININ PHA-L; THALAMIC PROJECTIONS; SENSORIMOTOR CORTEX; BARREL CORTEX; FRONTAL-LOBE; SPATIAL-DISTRIBUTION; MACACA-FASCICULARIS; ANTEROGRADE TRACER; NEURONAL-ACTIVITY;
Keywords:
ANTEROGRADE TRACING; HAND REPRESENTATION; PRIMATE; THALAMUS; AXONAL TERMINAL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
49
Recensione:
Indirizzi per estratti:
Citazione:
E.M. Rouiller et al., "DUAL MORPHOLOGY AND TOPOGRAPHY OF THE CORTICOTHALAMIC TERMINALS ORIGINATING FROM THE PRIMARY, SUPPLEMENTARY MOTOR, AND DORSAL PREMOTOR CORTICAL AREAS IN MACAQUE MONKEYS", Journal of comparative neurology, 396(2), 1998, pp. 169-185

Abstract

In the motor, somatosensory, and auditory systems of rodents and cats, the corticothalamic connection is composed of a main projection formed by small endings and a minor projection terminating with giant endings. To establish whether the corticothalamic projection originating from motor cortical areas in primates exhibits the same duality, the anterograde tracer biotinylated dextran amine was injected in eight macaque monkeys in the primary motor (M1; n = 3), the supplementary motor (SMA; n = 3) and the dorsal premotor (PMd; n = 2) cortical areas to label corticothalamic axons. The corticothalamic projection originating from these three motor cortical areas was characterized by the presence of axon terminals constituting the same two types of endings, observed both as boutons en passant and terminaux. The population of small endings exhibited a mean cross-sectional maximum diameter of 0.95 mu m (S.D. = 0.23), a range of diameters not overlapping that of giant endings (mean diameter = 3.46 mu m, S.D. = 0.74 mu m). Topographically, the giant endings originating from M1 were located in the same thalamic nucleus (ventroposterolateral nucleus, oral part) in which the small endings were found. In contrast, the giant endings originating from SMAand PMd were located in a thalamic nucleus (mediodorsal nucleus) distinct from the main termination zone formed by small endings. Along therostrocaudal axis, the giant endings were distributed in a restrictedzone, irrespective of the origin of the projection (M1, SMA, PMd). The dual morphology of corticothalamic endings, previously found in rodents and cats, is present in the motor system of subhuman primates for both primary and nonprimary motor cortical areas. (C) 1998 Wiley-Liss,Inc.

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Documento generato il 27/11/20 alle ore 04:07:28