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Titolo:
Neuromuscular fatigue during maximal concurrent hand grip and elbow flexion or extension
Autore:
Oda, S; Kida, N;
Indirizzi:
Kyoto Univ, Fac Integrated Human Studies, Lab Human Motor Control, Sakyo Ku, Kyoto 606, Japan Kyoto Univ Kyoto Japan 606 man Motor Control, Sakyo Ku, Kyoto 606, Japan Kyoto Univ, Grad Sch Human & Environm Studies, Lab Human Motor Control, Sakyo Ku, Kyoto 606, Japan Kyoto Univ Kyoto Japan 606 man Motor Control, Sakyo Ku, Kyoto 606, Japan
Titolo Testata:
JOURNAL OF ELECTROMYOGRAPHY AND KINESIOLOGY
fascicolo: 4, volume: 11, anno: 2001,
pagine: 281 - 289
SICI:
1050-6411(200108)11:4<281:NFDMCH>2.0.ZU;2-I
Fonte:
ISI
Lingua:
ENG
Soggetto:
MOTOR-UNIT-ACTIVITY; VOLUNTARY CONTRACTIONS; ISOMETRIC CONTRACTIONS; CONDUCTION-VELOCITY; MYOELECTRIC SIGNAL; MUSCLE FATIGUE; FORCE TREMOR; STIMULATED CONTRACTIONS; SURFACE ELECTROMYOGRAM; EXCITATION-FREQUENCY;
Keywords:
maximal voluntary contraction; muscle fatigue; electromyogram; force tremor; multijoint contraction;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Clinical Medicine
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Oda, S Kyoto Univ, Fac Integrated Human Studies, Lab Human Motor Control, Sakyo Ku, Kyoto 606, Japan Kyoto Univ Kyoto Japan 606 or Control, Sakyo Ku, Kyoto 606, Japan
Citazione:
S. Oda e N. Kida, "Neuromuscular fatigue during maximal concurrent hand grip and elbow flexion or extension", J ELECTROMY, 11(4), 2001, pp. 281-289

Abstract

The objective was to investigate muscle fatigue measuring changes in forceoutput and force tremor and electromyographic activity (EMG) during two sustained maximal isometric contractions for 60 s: (1) concurrent hand grip and elbow flexion (HG and EF); or (2) hand grip and elbow extension (HG and EE). Each force tremor amplitude was decomposed into four frequency bands (1-3, 4-10, 11-20, and 21-50 Hz). Surface EMGs were recorded from the flexordigitorum superficialis (FDS), extensor digitorum (ED), biceps brachii (BB) and lateral head of triceps brachii (TB). The HG and EF forces for the HGand EF and the HG force for the HG and EE declined rapidly, whereas the EEforce remained almost constant near to the initial value for the first 40 s and then declined. The decrease in EMG amplitude was observed not for theFDS muscle but for the ED muscle. The HG tremor amplitude for each frequency band showed similar decreasing rate, whereas the decreases in EF and EE tremor amplitudes for the lower band (below 10 Hz) were slower than those for the higher band (above 11 Hz). The neuromuscular mechanisms underlying muscle fatigue during sustained maximal concurrent contractions of hand gripand elbow flexion or extension are discussed. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/03/20 alle ore 14:01:01