Surface electromyography (EMG) assessment of biceps brachii muscles between the endplate region and distal tendon insertion on normal body mass index subjects and varying muscle contractions

• Published in: African journal of biotechnology 2012-04, Vol.11 (34), p.8553-8559
• Main Authors: Ahamed, N U, Sundaraj, K, Ahmad, R B, Rahman, S M, Ali, MA
• Format: Article
• Language: English
• ISSN: 1684-5315; 1684-5315
• DOI: 10.5897/AJB11.3310

The aim of this paper was to monitor the muscle activity and analyze the effect of electromyography (EMG) signal from the male and female biceps brachii muscles between the region of muscle endplate and distal tendon insertion. Electromyographic records were obtained from 12 muscles (subject's both arm's biceps muscle) during arm extension (move) and relaxation (rest). Three types of muscle contractions (a. isotonic concentric and eccentric b. isometric and, c. isokinetic) were performed with a 5 Kg standard load to record the EMG signal and the % of maximum voluntary muscle contraction (MVC) was 100%. Three (3) pairs of normal Asian subjects (n=6, 3 male and 3 female), age range from 20-30, and they are free from any musculoskeletal pain or disorder in biceps brachii muscle, were participated in this study. All the subjects were physically normal and having different bicep diameter. Results from both genders were compared with their left and right arm biceps brachii muscle to find out their muscle effectiveness and significant differences. A total of 144 samples from reported muscles were collected for analysis, and the sampling rate was 100Hz. Right arm biceps muscle near distal tendon of both male and female showed significantly higher muscle activity than their left arm. Then, there were significant differences between male left and female right arm, and between male right and female left arm. Also, this paper observed significantly increased activity of male's both arms compared to female's both arms for that particular muscle area. The acquired results of this research should be considered for biceps tendonitis rehabilitation and can make a comparison between any other biceps and triceps muscles.