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1988 | 39 | 1 |
Tytuł artykułu

Computer simulation study of the shape of motor unit action potential

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Treść / Zawartość
Warianty tytułu
Języki publikacji
EN
Abstrakty
EN
Piotrkiewicz, M.: Computer simulation study of the shape of motor unit action potential. Acta physiol, pol., 1988, 39(1): 35-45. Motor unit action potentials (MUAPs) of brachial biceps were simulated. A simulated MUAP was obtained as a sum of single fibre action potentials (SFAPs) from all the muscle fibres of a motor unit (MU). The influence of the following factors on MUAP shape for different kinds of recording electrode was studied: fibre density, neuromuscular jitter, temporal dispersion and electrode displacements. The simulation confirms that typical MUAPs recorded with needle electrodes from muscles of low fibre density such as brachial biceps are usually triphasic. Increased fibre density produces MUAPs of more complex shape and higher amplitude. Normal neuromuscular jitter is responsible for the variability of shape of subsequent potentials from the same MU as well as for electromyographic shimmer. Pathologic (increased) jitter makes the shapes of subsequent potentials unrecognizable. The influence of temporal dispersion is interconnected with other factors but rather of minor importance. The simulation shows how big changes in MUAP shape can be expected due to electrode displacements during single experiment or during estimation of MU territory.
Słowa kluczowe
EN
Wydawca
-
Rocznik
Tom
39
Numer
1
Opis fizyczny
p.35-45,fig.,ref.
Twórcy
  • Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, Warsaw, Poland
Bibliografia
  • 1. Buchthal, F., Guld, C., Rosenfalck, P. (1955) Innervation zone and propagation velocity in human muscle. Acta Physiol. Scand. 35. 174-190.
  • 2. Buchthal, F., Erminio, F., Rosenfalck, P. (1959) Motor unit territory in different human muscles. Acta Physiol. Scand. 45. 72-80.
  • 3. Dimitrov, G. V., Dimitrova, N. A. (1974) Extracellular potential field of a single striated muscle fibre immersed in an anisotropic volume conductor. Electromyogr. Clin. Neurophysiol. 14. 423-436.
  • 4. Gath, I., Stälberg, E. (T981) In situ measurement of the innervation ratio of motor units in human muscleis. Exp. Brain Res. 43. 377-382.
  • 5. Griep, P. A. M., Boon, K. L.,( Stegman, D. F. (1978) A study of the motor unit action potential by means of computer simulation. Biol. Cybern. 30. 221-230.
  • 6. Kaplan, P. E., Kaplan, C. (1978) The electromyographic shimmer in normal human muscles. Electromyogr. Clin. Neurophysiol. 18. 179-189.
  • 7. Lindstrom, L. H., Magnusison, R. J. (1977) Interpretation of myoelectric power spectra: a model and its applications. Proc. IEEE 65. 653-662.
  • 8. Miller-Larsson, A. (1986) Motor unit action potential field-modelling results. Biol. Cybern. 53. 307-321.
  • 9. Nandedkar, S. D., Stälberg, E. V., Sanders, D. B. (1985) Simulation techniques in electromyography. IEEE Trans. Biomed. Eng. BME-32. 775-785.
  • 10. Piotrkiewicz, M., Miller-Larsson, A. (1987) A method of description of single muscle fibre action potential by an analytical function V (t, r). Accepted for publication in Biol. Cybern.
  • 11. Stålberg, E., Trontelj, J. V. (1979) Single Fibre Electromyography, p. 244, The Mir- valle Press Ltd. Old Woking, Surrey.
  • 12. Thiele, B. (1985) Personal communication.
Typ dokumentu
Bibliografia
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