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Abstract
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Article Information:
Electromyographic Responses during Elbow Movement at Two Angles with Voluntary Contraction: Influences of Muscle Activity on Upper Arm Biceps Brachii
Nizam Uddin Ahamed, Kenneth Sundaraj, R. Badlishah Ahmad, Matiur Rahman, Asraf Ali and Anamul Islam
Corresponding Author: Nizam Uddin Ahamed
Submitted: June 07, 2012
Accepted: July 04, 2012
Published: November 15, 2012 |
Abstract:
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Analysis of Electromyography (EMG) signals generated by individuals is part of human
musculoskeletal system research and signals are always influenced by the electrode placement in the
muscle. This characteristic is also obvious at Biceps Brachii (BB) muscles during the movement of elbow
at different angles. The purpose of this study was to monitor and determine the BB muscle function in 3
conditions: (i) electrodes were placed at 3 locations on the BB, (ii) elbow was fixed at the two angles (90°
and 150°) and (iii) isometric contractions were performed to record EMG data. EMG data were obtained
from six healthy subjects (n = 6, mean±SD age = 24.4±3.1 years, body mass = 68±6.3 kg, height = 164±4.1
cm, BMI = 21.2±2.3, right arm dominated). A Bluetooth-enabled laptop, wireless EMG sensors, digital
dynamometer and angle meter were used for data recording. EMG data were calculated and analyzed by
average value, standard deviation, Root Mean Square (RMS) and highest peak of the signal during
maximum voluntary contraction. All the dependent variables were calculated using repeated measures
Analysis of Variance (ANOVA). The results from the research showed that (i) according to the calculation
of average RMS and the maximum peaks of EMG signals, there was a significant difference between 2
angles (p = 0.047, i.e., p<0.05), but no interaction at the same angles when overall average EMG and
standard deviation value are considered and (ii) majority of the outcomes showed that EMG activity is
higher in the order of middle, upper and lower BB muscle. It is therefore important that electrical signals
generated upon different electrode placements and angles on the BB muscle are used for biceps
rehabilitation and other physiological measurements on upper arm.
Key words: Angle, biceps brachii, electrode, EMG, isometric contraction, ,
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Cite this Reference:
Nizam Uddin Ahamed, Kenneth Sundaraj, R. Badlishah Ahmad, Matiur Rahman, Asraf Ali and Anamul Islam, . Electromyographic Responses during Elbow Movement at Two Angles with Voluntary Contraction: Influences of Muscle Activity on Upper Arm Biceps Brachii. Research Journal of Applied Sciences, Engineering and Technology, (22): 4591-4595.
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ISSN (Online): 2040-7467
ISSN (Print): 2040-7459 |
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