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Relationship between average muscle fibre conduction velocity and EMG power spectra during isometric contraction, recovery and applied ischemia

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Summary

The relationship between muscle fibre conduction velocity (MFCV) and the power spectrum of surface EMGs in 3 human volunteers was studied during isometric contractions at 40% maximum voluntary contraction. In addition, the recovery of these two parameters was measured during short lasting contractions at the same force level every 30 s. The recovery phase was also studied during ischaemia, thereby preventing the recovery of MFCV.

The mean MFCV was calculated by the cross-correlation method. The measurements were facilitated by a real-time estimation of the cross-correlation and the MFCV and by a graphic display of the digitised signal.

During contraction a nearly linear relation was found between MFCV and the median frequency of the power spectrum (MPF). During recovery this relationship was lost in one subject: MPF restored much faster then MFCV. During recovery under ischemia MFCV did not recover, but MPF recovered partially in all subjects.

It is concluded that the shift of the power spectrum to lower frequencies during fatigue cannot be explained by changes in MFCV alone. Central mechanisms also influence the power spectrum and studying the recovery of local muscle fatigue during ischemia may separate these influences from that of MFCV on the power spectrum during fatigue.

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References

  1. Arendt-Nielsen L, Mills KR (1985) The relationship between mean power frequency of the EMG spectrum and muscle fiber velocity. Electroenceph Clin Neurophysiol 60:130–134

  2. Arendt-Nielsen L, Forster A, Mills KR (1984) EMG power spectral shift and muscle-fiber conduction velocity during human muscle fatigue. J Physiol 353:54P

  3. Boon K, Hermens H, Van Westeinde C, Sollie G, Wallingade Jonge W (1983) The boundary conditions for the measurement of the conduction velocity of muscle fibers with surface EMG. Electroenceph Clin Neurophysiol 56:S49

  4. Buchtal F, Guld C, Rosenfalck P (1955) Innervation zone and propagation velocity in human muscle. Acta Physiol Scand 35:174–190

  5. De Luca CJ (1984) Myoelectric manifestations of localized muscle fatigue in humans. CRC Crit Rev Bioeng 11:251–279

  6. Eberstein A, Beattie B (1985) Simultaneous measurement of muscle conduction velocity and EMG power spectrum changes during fatigue. Muscle Nerve 8:768–773

  7. Edwards RHT (1981) Human muscle function and fatigue. In: Porter R and Whelan J (eds) Human muscle fatigue: physiological mechanisms. Ciba foundation symposium 82. Pitman Medical, London, pp 1–18

  8. Furness P, Jessop J, Lippold OJC (1977) Long lasting increases in the tremor of human hand muscles following brief, strong effort. J Physiol 265:821–831

  9. Hara T (1980) Evaluation of recovery from local muscle fatigue by voluntary test contractions. J Human Ergol 9:35–46

  10. Harris RC, Hultman E, Sahlin K (1981) Glycolytic intermediates in human muscle after isometric contraction. Pflügers Arch 389:277–282

  11. Lago P, Jones NB (1977) Effect of motor unit firing statistics on EMG spectra. Med Biol Eng Comput 15:648–655

  12. Lindstrom L, Magnusson R, Peterson I (1970) Muscular fatigue and action potential conduction velocity changes studied with frequency analysis of EMG signals. Electromyography 4:341–356

  13. Mills KR, Newham DJ, Edwards RHT (1984) Muscle pain. In: Wall PD and Melzack R (eds) Textbook of pain. Churchil Livingstone, London, pp 319–330

  14. Mortimer JT, Magnusson R, Petersen I (1970) Conduction velocity in ischemic muscle: effect on EMG frequency spectrum. Am J Physiol 219:1324–1329

  15. Naeye M, Zorn H (1982) Relation between EMG power spectrum shifts and muscle fibre action potential conduction velocity changes during local muscular fatigue in man. Eur J Appl Physiol 50:23–33

  16. Naeye M, Zorn H (1983) Estimation of the action potential conduction velocity in human skeletal muscle using the surface EMG cross-correlation technique. Electromyogr Clin Neurophysiol 23:73–80

  17. Person RS, Miskin LN (1964) Autoand cross correlation of the electrical activity of muscles. Med Biol Eng Comput 2:155–159

  18. Sadoyama T, Masuda T, Miyano H (1983) Relationships between muscle fiber conduction velocity and frequency parameters of surface EMG during sustained contraction. Eur J Appl Physiol 51:247–256

  19. Stalberg E (1966) Propagation velocity in human muscle fibers in situ. Acta Physiol Scand 287:3–112

  20. Stulen FB, De Luca CJ (1981) Frequency parameters of the myoelectric signal as a measure of muscle fiber conduction velocity. IEEE Trans biomed Eng BME-28:515–523

  21. Troni W, Cantello R, Rainero I (1983) Conduction velocity along human fibers in situ. Neurology 33:1453–1459

  22. Van Boxtel A, Schomaker LRB (1984) Influence of motor unit firing statistics on the median frequency of the EMG power spectrum. Eur J Appl Physiol 52:207–213

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Correspondence to M. J. Zwarts.

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Zwarts, M.J., Van Weerden, T.W. & Haenen, H.T.M. Relationship between average muscle fibre conduction velocity and EMG power spectra during isometric contraction, recovery and applied ischemia. Europ. J. Appl. Physiol. 56, 212–216 (1987). https://doi.org/10.1007/BF00640646

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Key words

  • Muscle fibre conduction velocity
  • EMG power spectral shift
  • Muscular fatigue
  • Recovery
  • Ischaemia