PMID: 3769911Jan 1, 1986Paper

Changes in the muscle fibre extracellular action potentials in long-lasting (fatiguing) activity

European Journal of Applied Physiology and Occupational Physiology
N RadichevaA Gydikov

Abstract

The dependence of extracellular action potentials (ECAPs) of single frog muscle fibres on intracellular action potentials (ICAPs) was studied during long-lasting (fatiguing) activity. The conduction velocity, peak-to-peak amplitude and amplitudes of the separate phases of the first and second ICAP time derivatives decreased during long-lasting activity. The phases of the first and second ICAP space derivatives also decreased in amplitude and lengthened. ECAPs near the membrane were similar in shape and proportional in amplitude to (formula; see text) when recording at a distance from both the end of the fibre and the point of stimulation. At long radial distances, the amplitudes of the separate ECAP phases depended on the amplitude and length of the corresponding phases of (formula; see text). Thus the decrease in ECAP amplitude during long-lasting activity at long radial distances was less than at points close to the muscle fibre membrane. The consequences of these findings for the changes in electromyograms recorded by needle or superficial electrodes during long-lasting (fatiguing) activity are discussed.

References

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Citations

Oct 29, 2002·Muscle & Nerve·Ya-Ju Chang, Richard K Shields
Nov 8, 2005·Experimental Brain Research·Kevin G KeenanRoger M Enoka
Mar 27, 2012·Medical & Biological Engineering & Computing·Javier Rodriguez-FalcesNonna Alexandrovna Dimitrova
Jan 1, 1991·Neuromuscular Disorders : NMD·M K PagalaD Grob
Apr 20, 2004·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·T I ArabadzhievN A Dimitrova
Apr 7, 2005·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·N A DimitrovaG V Dimitrov
Sep 12, 2002·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·N A Dimitrova, G V Dimitrov
Dec 19, 2002·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·N A Dimitrova, G V Dimitrov
Feb 14, 2004·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·I HostensH Ramon
Feb 18, 1999·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·K MasudaS Katsuta
Apr 30, 2003·The Journal of Physiology·Andrew J Fuglevand, Douglas A Keen
Sep 13, 2011·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·Javier Rodríguez-FalcesArmando Malanda
Jan 25, 2005·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·T I ArabadzhievN A Dimitrova
Jan 25, 2005·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·T I ArabadzhievN A Dimitrova
Sep 12, 2006·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·G V DimitrovN A Dimitrova
Mar 15, 2011·Journal of Neuroscience Methods·Javier RodríguezArmando Malanda
Jan 1, 1993·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·N I RadichevaN E Peneva
Sep 25, 2004·Muscle & Nerve·Robert J CallisterDouglas G Stuart
Mar 10, 2006·Journal of Electromyography and Kinesiology : Official Journal of the International Society of Electrophysiological Kinesiology·M Vydevska-ChichovaN Radicheva

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