Mohamad, Nor Zainah and Hamzaid, Nur Azah and Davis, Glen Macartney and Wahab, Ahmad Khairi Abdul and Hasnan, Nazirah (2017) Mechanomyography and Torque during FES-Evoked Muscle Contractions to Fatigue in Individuals with Spinal Cord Injury. Sensors, 17 (7). p. 1627. ISSN 1424-8220, DOI https://doi.org/10.3390/s17071627.
Full text not available from this repository.Abstract
A mechanomyography muscle contraction (MC) sensor, affixed to the skin surface, was used to quantify muscle tension during repetitive functional electrical stimulation (FES)-evoked isometric rectus femoris contractions to fatigue in individuals with spinal cord injury (SCI). Nine persons with motor complete SCI were seated on a commercial muscle dynamometer that quantified peak torque and average torque outputs, while measurements from the MC sensor were simultaneously recorded. MC-sensor-predicted measures of dynamometer torques, including the signal peak (SP) and signal average (SA), were highly associated with isometric knee extension peak torque (SP: r = 0.91, p < 0.0001), and average torque (SA: r = 0.89, p < 0.0001), respectively. Bland-Altman (BA) analyses with Lin’s concordance (ρC) revealed good association between MC-sensor-predicted peak muscle torques (SP; ρC = 0.91) and average muscle torques (SA; ρC = 0.89) with the equivalent dynamometer measures, over a range of FES current amplitudes. The relationship of dynamometer torques and predicted MC torques during repetitive FES-evoked muscle contraction to fatigue were moderately associated (SP: r = 0.80, p < 0.0001; SA: r = 0.77; p < 0.0001), with BA associations between the two devices fair-moderate (SP; ρC = 0.70: SA; ρC = 0.30). These findings demonstrated that a skin-surface muscle mechanomyography sensor was an accurate proxy for electrically-evoked muscle contraction torques when directly measured during isometric dynamometry in individuals with SCI. The novel application of the MC sensor during FES-evoked muscle contractions suggested its possible application for real-world tasks (e.g., prolonged sit-to-stand, stepping,) where muscle forces during fatiguing activities cannot be directly measured.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Higher Education, Malaysia and University of Malaya: HIR Grant No. UM.C/625/1/HIR/MOHE/ENG/39 and PPP Grant (PG155-2016A) |
| Uncontrolled Keywords: | MC sensor; Spinal cord injury (SCI); Muscle fatigue; Functional electrical stimulation (FES) |
| Subjects: | R Medicine T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Engineering Faculty of Medicine |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 04 Sep 2018 05:56 |
| Last Modified: | 26 Feb 2021 03:57 |
| URI: | http://eprints.um.edu.my/id/eprint/19093 |
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