Difference in changes of surface EMG during low-level static contraction between monopolar and bipolar lead.
作者： Junya Ohashi
DOI: 10.2114/AHS.14.79
关键词:
摘要: The changes in surface electromyogram(EMG) during sustained contractions were compared between monopolar and bipolar lead. Ten subjects performed static elbow flexion at contraction levels of 10 40% maximum voluntary contraction(MVC). Seven knee extension 3, 8, 15%MVC. Surface EMGs recorded from the biceps brachii, vastus lateralis, rectus femoris medialis Mean amplitude EMG(AEMG) frequency spectra EMG calculated. AEMG was larger than except 3 cases. changed more abruptly EMG. Relative power low frequencies increased(slowing) all cases But sometimes did not show slowing. Decrease relative frequencies(quickening) seen contractions. This quickening marked because its large study shows that obscure slowing a low-level fatiguing is related to lead methods. Led methods using simple model. sphere reflects(pickup sphere) difference pickup thought be main reason for
sci-hub.se 参考文章(20)
M Hagberg, Electromyographic signs of shoulder muscular fatigue in two elevated arm positions. American journal of physical medicine. ,vol. 60, pp. 111- 121 ,(1981)
K. Kogi, Slowing of surface electromyogram and muscle strength in muscle fatigue. Reports of the Institute for Science of Labour. ,(1962)
Junya Ohashi, Koichi Iwanaga, Haruhiko Sato, Relation of subjective sensations to electromyogram and heart rate in sustained isometric shoulder abductions at 5-50% MVC. Journal of human ergology. ,vol. 16, pp. 3- 17 ,(1987) , 10.11183/JHE1972.16.3
Don B. Chaffin, Localized muscle fatigue--definiton and measurement. Journal of Occupational and Environmental Medicine. ,vol. 15, pp. 346- 354 ,(1973)
Gisela Sj�gaard, Gabrielle Savard, Carsten Juel, Muscle blood flow during isometric activity and its relation to muscle fatigue. European Journal of Applied Physiology. ,vol. 57, pp. 327- 335 ,(1988) , 10.1007/BF00635992
Claes Krogh-Lund, Kurt J�rgensen, Myo-electric fatigue manifestations revisited: power spectrum, conduction velocity, and amplitude of human elbow flexor muscles during isolated and repetitive endurance contractions at 30% maximal voluntary contraction European Journal of Applied Physiology. ,vol. 66, pp. 161- 173 ,(1993) , 10.1007/BF01427058
M. J. Zwarts, T. W. Van Weerden, H. T. M. Haenen, Relationship between average muscle fibre conduction velocity and EMG power spectra during isometric contraction, recovery and applied ischemia European Journal of Applied Physiology. ,vol. 56, pp. 212- 216 ,(1987) , 10.1007/BF00640646
ROGER MALMQVIST, INGRID EKHOLM, LARS LINDSTRÖM, INGEMAR PETERSÉN, ROLAND ÖRTENGREN, THORVALD BJURö, PETER HERBERTS, ROLAND KADEFORS, Measurement of localized muscle fatigue in building work. Ergonomics. ,vol. 24, pp. 695- 709 ,(1981) , 10.1080/00140138108924892
NILS FALLENTIN, BJØRN SIDENIUS, KURT JØRGENSEN, Blood pressure, heart rate and EMG in low level static contractions. Acta Physiologica Scandinavica. ,vol. 125, pp. 265- 275 ,(1985) , 10.1111/J.1748-1716.1985.TB07715.X
P. A. Lynn, N. D. Bettles, A. D. Hughes, S. W. Johnson, Influence of electrode geometry on bipolar recordings of the surface electromyogram Medical & Biological Engineering & Computing. ,vol. 16, pp. 651- 660 ,(1978) , 10.1007/BF02442444