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Titolo:
MOTONEURONAL PROJECTION PATTERN OF SINGLE C3-C4 PROPRIOSPINAL NEURONS
Autore:
TANTISIRA B; ALSTERMARK B; ISA T; KUMMEL H; PINTER M;
Indirizzi:
UMEA UNIV,DEPT PHYSIOL S-90187 UMEA SWEDEN GOTHENBURG UNIV,DEPT PHYSIOL S-41390 GOTHENBURG SWEDEN
Titolo Testata:
Canadian journal of physiology and pharmacology
fascicolo: 4, volume: 74, anno: 1996,
pagine: 518 - 530
SICI:
0008-4212(1996)74:4<518:MPPOSC>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
PATHWAYS CONTROLLING FORELIMB; CONJUGATED HORSERADISH-PEROXIDASE; DORSAL NECK MOTONEURONS; CAT DISTAL FORELIMB; MOTO-NEURONS; SPINAL-CORD; SPINODELTOIDEUS MOTONEURONS; TRANSNEURONAL TRANSPORT; AXONAL PROJECTION; C6-TH1 SEGMENTS;
Keywords:
TARGET REACHING; C3-C4 PROPRIOSPINAL NEURONS; MOTONEURONS; CAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
46
Recensione:
Indirizzi per estratti:
Citazione:
B. Tantisira et al., "MOTONEURONAL PROJECTION PATTERN OF SINGLE C3-C4 PROPRIOSPINAL NEURONS", Canadian journal of physiology and pharmacology, 74(4), 1996, pp. 518-530

Abstract

The pattern of motoneuronal projection and termination of single C3-C4 propriospinal neurones in the forelimb segments C6-T1 of the cat wasinvestigated by intra-axonal injection of horseradish peroxidase intostem axons. Twelve well-stained axons were used for analysis. Termination was observed in the estimated location of motor nuclei innervating pure shoulder muscles in 10 cases. Among motoneurones innervating shoulder, elbow, wrist, and digit muscles, projection and termination were observed in motor nuclei controlling muscles of two or three jointsin the following combinations: shoulder + elbow, shoulder + wrist, shoulder + elbow + wrist, shoulder + elbow + digit, and elbow + wrist + digit. In one case it was difficult to exclude the possibility of projection and termination in motor nuclei controlling muscles at all fourjoints. These patterns of motoneuronal projection from C3-C4 propriospinal neurones are compatible with their function in mediating the descending command for visually guided target reaching movements with theforelimb. In addition, it was found that the C3-C4 propriospinal neurones project and terminate in the region of ventral and ventromedial motor nuclei, which innervate axial muscles acting on the trunk. This was confirmed by intracellular recording from presumed ventromedial motoneurones in the C6-C7 segments. It is postulated that the C3-C4 propriospinal neurones, in addition to their control of forelimb movements,provide for conjoint control of axial muscles to stabilize the trunk during target reaching.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 23:36:25