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Segmenting mechanomyography measures of muscle activity phases using inertial data

Segmenting mechanomyography measures of muscle activity phases using inertial data
Segmenting mechanomyography measures of muscle activity phases using inertial data
Electromyography (EMG) is the standard technology for monitoring muscle activity in laboratory environments, either using surface electrodes or fine wire electrodes inserted into the muscle. Due to limitations such as cost, complexity, and technical factors, including skin impedance with surface EMG and the invasive nature of fine wire electrodes, EMG is impractical for use outside of a laboratory environment. Mechanomyography (MMG) is an alternative to EMG, which shows promise in pervasive applications. The present study used an exerting squat-based task to induce muscle fatigue. MMG and EMG amplitude and frequency were compared before, during, and after the squatting task. Combining MMG with inertial measurement unit (IMU) data enabled segmentation of muscle activity at specific points: entering, holding, and exiting the squat. Results show MMG measures of muscle activity were similar to EMG in timing, duration, and magnitude during the fatigue task. The size, cost, unobtrusive nature, and usability of the MMG/IMU technology used, paired with the similar results compared to EMG, suggest that such a system could be suitable in uncontrolled natural environments such as within the home.
2045-2322
1-10
Woodward, Richard B.
f29b0585-7a17-407f-bd4b-9f0b892e26c5
Stokes, Maria J.
71730503-70ce-4e67-b7ea-a3e54579717f
Shefelbine, Sandra J.
c457dbd4-9ef8-4ca2-b538-ebbe82dea382
Vaidyanathan, Ravi
7758a2b8-34be-499d-a4f0-41aa4cae70d2
Woodward, Richard B.
f29b0585-7a17-407f-bd4b-9f0b892e26c5
Stokes, Maria J.
71730503-70ce-4e67-b7ea-a3e54579717f
Shefelbine, Sandra J.
c457dbd4-9ef8-4ca2-b538-ebbe82dea382
Vaidyanathan, Ravi
7758a2b8-34be-499d-a4f0-41aa4cae70d2

Woodward, Richard B., Stokes, Maria J., Shefelbine, Sandra J. and Vaidyanathan, Ravi (2019) Segmenting mechanomyography measures of muscle activity phases using inertial data. Scientific Reports, 9 (1), 1-10. (doi:10.1038/s41598-019-41860-4).

Record type: Article

Abstract

Electromyography (EMG) is the standard technology for monitoring muscle activity in laboratory environments, either using surface electrodes or fine wire electrodes inserted into the muscle. Due to limitations such as cost, complexity, and technical factors, including skin impedance with surface EMG and the invasive nature of fine wire electrodes, EMG is impractical for use outside of a laboratory environment. Mechanomyography (MMG) is an alternative to EMG, which shows promise in pervasive applications. The present study used an exerting squat-based task to induce muscle fatigue. MMG and EMG amplitude and frequency were compared before, during, and after the squatting task. Combining MMG with inertial measurement unit (IMU) data enabled segmentation of muscle activity at specific points: entering, holding, and exiting the squat. Results show MMG measures of muscle activity were similar to EMG in timing, duration, and magnitude during the fatigue task. The size, cost, unobtrusive nature, and usability of the MMG/IMU technology used, paired with the similar results compared to EMG, suggest that such a system could be suitable in uncontrolled natural environments such as within the home.

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Accepted/In Press date: 18 March 2019
e-pub ahead of print date: 3 April 2019

Identifiers

Local EPrints ID: 430206
URI: https://eprints.soton.ac.uk/id/eprint/430206
ISSN: 2045-2322
PURE UUID: a719d717-d977-4f3f-a665-1f6b88341d41
ORCID for Maria J. Stokes: ORCID iD orcid.org/0000-0002-4204-0890

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Date deposited: 16 Apr 2019 16:30
Last modified: 20 Jul 2019 01:02

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Contributors

Author: Richard B. Woodward
Author: Maria J. Stokes ORCID iD
Author: Sandra J. Shefelbine
Author: Ravi Vaidyanathan

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