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Investigation of the EMG-angle Relationship in the Upper-limb Muscles during Isometric Contraction

Rabbi, M. F. and Ahamed, Nizam Uddin and Alqahtani, Mahdi and Altwijri, Omar and Kamarul Hawari, Ghazali and Sundaraj, K. (2017) Investigation of the EMG-angle Relationship in the Upper-limb Muscles during Isometric Contraction. Biomedical Research (India), 28 (6). pp. 2393-2397. ISSN 0970-938X

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Purpose: The relationship between EMG and elbow angle was investigated to identify the signal characteristics of upper-limb muscles during isometric contraction. The study would improve the current understanding of electrophysiological activities of the human upper limbs, which would aid the development of prosthetic arms for rehabilitation research. Subjects and methods: Ten subjects aged 22.4(±1.5) years participated in this study. The electromyography signals from the biceps brachii muscle were recorded during isometric contraction. The root mean square and mean absolute value of the EMG signals were calculated and evaluated to assess the relationship between the signals and elbow angles. In addition, the force exerted by the upper limb was recorded using a dynamometer to identify more features of the relationship. Results: The results revealed that both the RMS and MAV of the EMG signals are not significantly related with the elbow angle (r2=0.70 and 0.21; p=0.075 and 0.43, respectively). In contrast, the force is strongly related to the elbow angle (r2=0.88, p=0.017). Conclusion: A stronger electrical signal was generated by the upper-limb muscles with an increase in the angle of the elbow joint, whereas a lower force was obtained with an increase in the elbow joint angle.

Item Type: Article
Uncontrolled Keywords: Electromyography, Elbow angle, Rehabilitation
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
Faculty/Division: Faculty of Electrical & Electronic Engineering
Faculty of Manufacturing Engineering
Depositing User: Noorul Farina Arifin
Date Deposited: 11 Sep 2017 03:01
Last Modified: 21 Feb 2018 06:42
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