Mohamad Saadon, Nurul Salwani and Hamzaid, Nur Azah and Hasnan, Nazirah and Dzulkifli, Muhammad Afiq and Davis, Glen Macartney (2019) Electrically evoked wrist extensor muscle fatigue throughout repetitive motion as measured by mechanomyography and near-infrared spectroscopy. Biomedical Engineering / Biomedizinische Technik, 64 (4). pp. 439-448. ISSN 0013-5585, DOI https://doi.org/10.1515/bmt-2018-0058.
Full text not available from this repository.Abstract
Repetitive electrically-evoked muscle contraction leads to accelerated muscle fatigue. This study assessed electrically-evoked fatiguing muscle with changes to mechanomyography root mean square percentage (%RMS-MMG) and tissue saturation index (%TSI) in extensor carpi radialis. Forty healthy volunteers (n=40) performed repetitive electrical-evoked wrist extension to fatigue and results were analyzed pre- and post-fatigue, i.e. 50% power output (%PO) drop. Responses of %PO, %TSI and %RMS-MMG were correlated while the relationships between %RMS-MMG and %TSI were investigated using linear regression. The %TSI for both groups were negatively correlated with declining %PO as the ability of the muscle to take up oxygen became limited due to fatigued muscle. The %RMS-MMG behaved in two different patterns post-fatigue against declining %PO whereby; (i) group A showed positive correlation (%RMS-MMG decreased) throughout the session and (ii) group B demonstrated negative correlation (%RMS-MMG increased) with declining %PO until the end of the session. Regression analysis showed %TSI was inversely proportional to %RMS-MMG during post-fatigue in group A. Small gradients in both groups suggested that %TSI was not sensitive to the changes in %RMS-MMG and they were mutually exclusive. Most correlation and regression changed significantly post-fatigue indicating that after fatigue, the condition of muscle had changed mechanically and physiologically. © 2019 Walter de Gruyter GmbH, Berlin/Boston.
| Item Type: | Article |
|---|---|
| Funders: | A grant from Fundamental Research Grant Scheme (FRGS) (Project No: FP027-2015A), Postgraduate Research Grant (PPP) from University of Malaya (Project No: PG349-2016A) |
| Uncontrolled Keywords: | fatigue; functional electrical stimulation; muscle oxygenation; muscle strength; rehabilitation; upper limb |
| Subjects: | R Medicine |
| Divisions: | Faculty of Engineering Faculty of Medicine |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 12 Mar 2020 01:16 |
| Last Modified: | 12 Mar 2020 01:16 |
| URI: | http://eprints.um.edu.my/id/eprint/24012 |
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