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Titolo:
Quantitative EMG and motor unit recruitment threshold using a concentric needle with quadrifilar electrode
Autore:
Akaboshi, K; Masakado, Y; Chino, N;
Indirizzi:
Keio Univ, Sch Med, Dept Rehabil Med, Shinjuku Ku, Tokyo 160, Japan Keio Univ Tokyo Japan 160 ept Rehabil Med, Shinjuku Ku, Tokyo 160, Japan
Titolo Testata:
MUSCLE & NERVE
fascicolo: 3, volume: 23, anno: 2000,
pagine: 361 - 367
SICI:
0148-639X(200003)23:3<361:QEAMUR>2.0.ZU;2-N
Fonte:
ISI
Lingua:
ENG
Soggetto:
ACTION-POTENTIALS; MACRO-EMG; SIZE; FORCE;
Keywords:
decomposition; motor unit; quantitative EMG analysis; recruitment threshold; size principle;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
22
Recensione:
Indirizzi per estratti:
Indirizzo: Masakado, Y Keio Univ, Sch Med, Dept Rehabil Med, Shinjuku Ku, 35 Shinanomachi, Tokyo 160, Japan Keio Univ 35 Shinanomachi Tokyo Japan 160 i, Tokyo 160, Japan
Citazione:
K. Akaboshi et al., "Quantitative EMG and motor unit recruitment threshold using a concentric needle with quadrifilar electrode", MUSCLE NERV, 23(3), 2000, pp. 361-367

Abstract

According to Henneman's size principle, small motor units are recruited before large ones. We used the electromyographic (EMG) signal decomposition technique to determine the quantitative relationships between five motor unit action potential (MUAP) parameters (amplitude, duration, area, thickness,and size index) and the recruitment threshold of the motor units recruitedup to 50% of the maximum voluntary contraction in the first dorsal interosseous, biceps brachii, rectus femoris, and tibialis anterior muscles of 5 healthy young men. In each muscle, the amplitude, duration, area, and size index had significant, positive high correlations with the motor unit recruitment thresholds. We conclude that the size principle applies to recordingsmade with concentric needle EMG electrodes under special recording conditions, and therefore that more importance should be attached to the patient'scontraction force during EMG examinations in order to evaluate MUAPs for electrodiagnostic purposes. (C) 2000 John Wiley & Sons, Inc. Muscle Nerve 23: 361-367, 2000.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 02/12/20 alle ore 05:07:44