Quadriceps mechanomyography reflects muscle fatigue during electrical stimulus-sustained standing in adults with spinal cord injury–a proof of concept

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dc.contributor.authorIbitoye, Morufu
dc.date.accessioned2021-09-14T13:34:10Z
dc.date.available2021-09-14T13:34:10Z
dc.date.issued2020
dc.description.abstractThis study investigates whether mechanomyography (MMG) produced from contracting muscles as a measure of their performance could be a proxy of muscle fatigue during a sustained functional electrical stimulation (FES)-supported standing-to-failure task. Bilateral FES-evoked contractions of quadriceps and glutei muscles, of four adults with motor-complete spinal cord injury (SCI), were used to maintain upright stance using two different FES frequencies: high frequency (HF - 35 Hz) and low frequency (LF - 20 Hz). The time at 30° knee angle reduction was taken as the point of critical "fatigue failure", while the generated MMG characteristics were used to track the pattern of force development during stance. Quadriceps fatigue, which was primarily responsible for the knee buckle, was characterized using MMG-root mean square (RMS) amplitude. A double exponential decay model fitted the MMG fatigue data with good accuracy [R2 = 0.85-0.99; root mean square error (RMSE) = 2.12-8.10] implying changes in the mechanical activity performance of the muscle's motor units. Although the standing duration was generally longer for the LF strategy (31-246 s), except in one participant, when compared to the HF strategy, such differences were not significant (p > 0.05) but suggested a faster muscle fatigue onset during HF stimulation. As MMG could discriminate between different stimulation frequencies, we speculate that this signal can quantify muscle fatigue characteristics during prolonged FES applications.en_US
dc.description.sponsorshipThe study was approved by the University of Malaya Medical Ethics Committee (Approval/ MECID. NO: 20164-2366) in accordance with the Declaration of Helsinki.en_US
dc.identifier.citationIbitoye, M.O., Hamzaid N.A., Abdul Wahab, A.K., Hasnan, N. & Davis, G.M. (2020): Quadriceps mechanomyography reflects muscle fatigue during electrical stimulus-sustained standing in adults with spinal cord injury – a proof of concept. Biomedical Engineering / Biomedizinische Technik. 65 (2); 165-174, Published by De Gruyter, Berlin, Germany. Available online at https://doi.org/10.1515/bmt-2019-0118en_US
dc.identifier.urihttps://doi.org/10.1515/bmt-2019-0118
dc.identifier.urihttps://uilspace.unilorin.edu.ng/handle/20.500.12484/6299
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectFES-supported standingen_US
dc.subjectfunctional electrical stimulationen_US
dc.subjectmechanomyographyen_US
dc.subjectmuscle fatigueen_US
dc.subjectspinal cord injuryen_US
dc.titleQuadriceps mechanomyography reflects muscle fatigue during electrical stimulus-sustained standing in adults with spinal cord injury–a proof of concepten_US
dc.typeArticleen_US

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