Muscle functional state assessment by estimation of muscle fiber conduction velocity

Autor: A. Kosev, I. B. Kozlovskaja, Yu. A. Koryak, L. Christova, B. Georgieva
Rok vydání: 2008
Předmět:
Zdroj: Human Physiology. 34:742-747
ISSN: 1608-3164
0362-1197
DOI: 10.1134/s0362119708060121
Popis: In 20 healthy subjects (10 males and 10 females) aged between 24 and 45, the conduction velocity (CV) of excitation along muscle fibers was measured in m. biceps brachii muscle using level averaging of interference electromyograms (EMGs) recorded by branched and monopolar surface electrodes. The measured CV, recorded with both monopolar and branched electrodes, were essentially equal (p < 0.05) at all different muscle tensions (10, 25, 50, and 75% of maximal voluntary contractions (MVCs)) and for all investigated healthy subjects. The CV was significant higher (p < 0.05) at 50 and 75% compared to 10 and 25% of MVC. In branched averaged potentials (AvPs), the terminal positive phase was suppressed. The monopolar AvPs were with waveform similar to those of motor units potentials and the parameters of the phases of different potentials (including the terminal positive one) may give additional information on functional state of muscles.
Databáze: OpenAIRE
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