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Titolo:
COMPARISON OF THE CONNECTIONAL PROPERTIES OF THE 2 FORELIMB AREAS OF THE RAT SENSORIMOTOR CORTEX - SUPPORT FOR THE PRESENCE OF A PREMOTOR OR SUPPLEMENTARY MOTOR CORTICAL AREA
Autore:
ROUILLER EM; MORET V; LIANG FY;
Indirizzi:
UNIV FRIBOURG,INST PHYSIOL,RUE MUSEE 5 CH-1700 FRIBOURG SWITZERLAND
Titolo Testata:
Somatosensory & motor research
fascicolo: 3, volume: 10, anno: 1993,
pagine: 269 - 289
SICI:
0899-0220(1993)10:3<269:COTCPO>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
LEUKOAGGLUTININ PHA-L; RETROGRADE AXONAL-TRANSPORT; SOMATIC SENSORY CORTEX; MACAQUE MONKEY; EFFERENT CONNECTIONS; INTRACORTICAL MICROSTIMULATION; CORTICOSPINAL PROJECTIONS; HORSERADISH-PEROXIDASE; THALAMIC PROJECTIONS; AFFERENT CONNECTIONS;
Keywords:
MOTOR CORTEX; BASAL GANGLIA; THALAMUS; TRACING; DOUBLE LABELING; PHASEOLUS-VULGARIS LEUKOAGGLUTININ; BIOCYTIN; WGA-HRP; CHOLERA TOXIN; RAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
66
Recensione:
Indirizzi per estratti:
Citazione:
E.M. Rouiller et al., "COMPARISON OF THE CONNECTIONAL PROPERTIES OF THE 2 FORELIMB AREAS OF THE RAT SENSORIMOTOR CORTEX - SUPPORT FOR THE PRESENCE OF A PREMOTOR OR SUPPLEMENTARY MOTOR CORTICAL AREA", Somatosensory & motor research, 10(3), 1993, pp. 269-289

Abstract

The existence of multiple motor cortical are as that differ in some of their ProPerties is well known in primates, but is less clear in therat. The present study addressed this question from the point of viewof connectional properties by comparing the afferent and efferent projections of the caudal forelimb area (CFA), considered to be the equivalent of the forelimb area of the primary motor cortex (MI), and a second forelimb motor representation, the rostral forelimb area (RFA). Asa result of various tracing experiments (including double labeling), it was observed that CFA and RFA had reciprocal corticocortical connections characterized by preferential, asymmetrical, laminar distribution, indicating that RFA may occupy a different hierarchical level than CFA, according to criteria previously discussed in the visual cortex of primates. Furthermore, it was found that RFA, but not CFA, exhibiteddense reciprocal connections with the insular cortex. With respect totheir efferent projection to the basal ganglia, it was observed that CFA projected very densely to the lateral portion of the ipsilateral caudate putamen, whereas the contralateral projection was sparse and more restricted. The ipsilateral projection originating from RFA was slightly less dense than that from CFA, but it covered a larger portion of the caudate putamen (in the medial direction); the contralateral projection from RFA to the caudate putamen was of the same density and extent as the ipsilateral projection. The reciprocal thalamocortical andcorticothalamic connections of RFA and CFA differed from each other in the sense that CFA was mainly interconnected with the ventrolateral thalamic nucleus, while RFA was mainly connected with the ventromedialthalamic nucleus. Altogether, these connectional differences, compared with the pattern of organization of the motor cortical areas in primates, suggest that RFA in the rat may well be an equivalent of the premotor or supplementary motor area. In contrast to the corticocortical,corticostriatal, and thalamocortical connections, RFA and CFA showed similar efferent projections to the subthalamic nucleus, substantia nigra, red nucleus, tectum, pontine nuclei, inferior olive, and spinal cord.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 16:34:58