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Titolo:
PREDICTIONS OF THE TIME-COURSE OF FORCE AND POWER OUTPUT BY DOGFISH WHITE MUSCLE-FIBERS DURING BRIEF TETANI
Autore:
CURTIN NA; GARDNERMEDWIN AR; WOLEDGE RC;
Indirizzi:
CHARING CROSS & WESTMINSTER MED SCH,DEPT PHYSIOL,FULHAM PALACE RD LONDON W6 8RF ENGLAND UNIV COLL LONDON,DEPT PHYSIOL LONDON WC1E 6BT ENGLAND UNIV COLL LONDON,ROYAL NATL ORTHOPAED HOSP TRUST,INST HUMAN PERFOMANCE STANMORE HA7 4LP MIDDX ENGLAND
Titolo Testata:
Journal of Experimental Biology
fascicolo: 1, volume: 201, anno: 1998,
pagine: 103 - 114
SICI:
0022-0949(1998)201:1<103:POTTOF>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
FROG SKELETAL-MUSCLE; VELOCITY RELATIONSHIP; FIBERS; RELAXATION; DEACTIVATION; CONTRACTION; FATIGUE;
Keywords:
MUSCLE CONTRACTION; SERIES ELASTICITY; SERIES COMPLIANCE; FORCE-VELOCITY RELATIONSHIP; POWER; WHITE MUSCLE FIBER; DOGFISH; SCYLIORHINUS CANICULA; FISH MUSCLE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
23
Recensione:
Indirizzi per estratti:
Citazione:
N.A. Curtin et al., "PREDICTIONS OF THE TIME-COURSE OF FORCE AND POWER OUTPUT BY DOGFISH WHITE MUSCLE-FIBERS DURING BRIEF TETANI", Journal of Experimental Biology, 201(1), 1998, pp. 103-114

Abstract

The aim of this study was to identify the principal factors that determine the time course of force and power output by muscle during patterns of stimulation and movement similar to those during fish swimming,Fully activated, white muscle fibres isolated from dogfish Scyliorhinus canicula were used to characterize the force-velocity relationship of the contractile component (CC) and the stress-strain relationship of the passive, elastic component (SEC) in series with the CC. A simplemodel of the time course of crossbridge activation during brief contractions was devised, Using the mechanical properties of the CC and SECand the activation time course, force and power were predicted for brief contractions with constant-velocity movement and also for brief contractions starting at various times during sinusoidal movement. The predicted force and power were compared with observations for these patterns of stimulation and movement, The predictions matched the observations well for the period during stimulation, Matching of force was much less good for some specific conditions during relaxation, the period during which force persists after the end of stimulation, If either the slow rise of activation or the SEC was omitted from the calculation, the predictions were poor, even during stimulation, Additional factors which may influence force are discussed, These include the after-effects of shortening and stretch, the variation of force during constant-velocity stretch and non-uniform behaviour within the muscle.

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Documento generato il 30/09/20 alle ore 08:34:03