Validation and use of a musculoskeletal gait model to study the role of functional electrical stimulation

Ding, Ziyun and Azmi, Nur Liyana and Bull, Anthony M.J. (2019) Validation and use of a musculoskeletal gait model to study the role of functional electrical stimulation. IEEE Transactions on Biomedical Engineering, 66 (3). pp. 892-897. ISSN 0018-9294 E-ISSN 1558-2531

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Abstract

Objective: Musculoskeletal modeling has been used to predict the effect of functional electrical stimulation (FES) on the mechanics of the musculoskeletal system. However, validation of the resulting muscle activations due to FES is challenging as conventional electromyography (EMG) recording of signals from the stimulated muscle is affected by stimulation artefacts. A validation approach using a combination of musculoskeletal modeling and EMG was proposed, whereby the effect on nonstimulated muscles is assessed using both techniques. The aim is to quantify the effect of FES on biceps femoris long head (BFLH) and validate this directly against EMG of gluteus maximus (GMAX). The hypotheses are that GMAX activation correlates with BFLH activation; and the muscle activation during FES gait can be predicted using musculoskeletal modeling. Methods: Kinematics, kinetics, and EMG of healthy subjects were measured under four walking conditions (normal walking followed by FES walking with three levels of BFLH stimulation). Measured kinematics and kinetics served as inputs to the musculoskeletal model. Results: Strong positive correlations were found between GMAX activation and BFLH activation in early stance peak (R = 0.78, p = 0.002) and impulse (R = 0.63, p = 0.021). The modeled peak and impulse of GMAX activation increased with EMG peak (p < 0.001) and impulse (p = 0.021). Conclusion: Musculoskeletal modeling can be used reliably to quantify the effect of FES in a healthy gait. Significance: The validation approach using EMG and musculoskeletal modeling developed and tested can potentially be applied to the use of FES for other muscles and activities.

Item Type:	Article (Journal)
Additional Information:	8381/71743
Uncontrolled Keywords:	Functional electrical stimulation, musculoskeletal modelling
Subjects:	T Technology > T Technology (General)
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Mechatronics Engineering
Depositing User:	Engku Norulizati Engku Aziz
Date Deposited:	23 Apr 2019 13:46
Last Modified:	31 Mar 2020 19:18
URI:	http://irep.iium.edu.my/id/eprint/71743

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