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Titolo:
Control of the wrist joint in humans
Autore:
Bawa, P; Chalmers, GR; Jones, KE; Sogaard, K; Walsh, ML;
Indirizzi:
Western Washington Univ, Dept Phys Educ Hlth & Recreat, Bellingham, WA 98225 USA Western Washington Univ Bellingham WA USA 98225 Bellingham, WA 98225 USA Simon Fraser Univ, Burnaby, BC V5A 1S6, Canada Simon Fraser Univ Burnaby BC Canada V5A 1S6 , Burnaby, BC V5A 1S6, Canada Natl Inst Occupat Hlth, DK-2100 Copenhagen, Denmark Natl Inst Occupat Hlth Copenhagen Denmark DK-2100 00 Copenhagen, Denmark
Titolo Testata:
EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY
fascicolo: 2-3, volume: 83, anno: 2000,
pagine: 116 - 127
SICI:
1439-6319(200010)83:2-3<116:COTWJI>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
HUMAN UPPER-LIMB; MOTOR UNITS; RECIPROCAL INHIBITION; RECURRENT INHIBITION; SYNAPTIC CONNECTIONS; HUMAN MOTONEURONS; SIZE PRINCIPLE; MUSCLE; CONTRACTIONS; EXTENSION;
Keywords:
recruitment; interneurons; reflexes; corticomotoneuron; motoneuron;
Tipo documento:
Review
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
47
Recensione:
Indirizzi per estratti:
Indirizzo: Chalmers, GR Western Washington Univ, Dept Phys Educ Hlth & Recreat, Bellingham, WA 98225 USA Western Washington Univ Bellingham WA USA 98225 WA 98225 USA
Citazione:
P. Bawa et al., "Control of the wrist joint in humans", EUR J A PHY, 83(2-3), 2000, pp. 116-127

Abstract

As one considers changes in motor activity from lower mammals to higher primates? one of the major changes one observes lies in the cortical control of forelimb muscles. There has been a shift from disynaptic control of spinal motoneurons in, for example, the cat, to a greater and greater percentage of monosynaptic control of hand and forelimb motoneurons in the primate. In spite of the species and evolutionary changes in the synaptic connections of the corticospinal tract, it appears that the interneurons identified in the cat are retained in the monkey and human. These interneurons, under the influence of descending pathways, modulate the output of motoneuron pools. Perhaps the control of these interneurons has also changed towards finercontrol of movement, as has been suggested by recent studies in the monkey. Whether in cat or human, the recruitment pattern for motor units is the same: the change from disynaptic to monosynaptic connections has not changedthe recruitment pattern of muscles. Differences in the recruitment patterns of muscles may lie in the finer control of inputs to motoneurons in the primate. This review seeks to integrate the current knowledge of the mechanisms involved in the motor control of the wrist joint and especially in the recruitment patterns of the muscles. These motor control mechanisms includethe biomechanics of the wrist joint, recruitment patterns of wrist muscles, interneurons and spinal cord circuits in the cervical regions mediating the output of spinal motoneurons, and the supraspinal control of these muscles.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 05:37:16