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REGISTRATION OF MOTOR UNITS ACTION POTENTIALS OF M.BICEPS BRACHII IN FATIGUE
Institute of physiology, Medical faculty , Novi Sad , Serbia
Institute of physiology, Medical faculty Pristina , Kosovska Mitrovica , Kosovo*
Institute of physiology, Medical faculty , Novi Sad , Serbia
Institute of physiology, Medical faculty , Novi Sad , Serbia
Institute of physiology, Medical faculty , Novi Sad , Serbia
Published: 01.01.2008.
Volume 36, Issue 1 (2008)
pp. 33-36;
Abstract
The aim of this study was registration of change in the amplitude of motor unit action potentials of m. bicepsa brachii of the dominant arm in fatigue. Investigation as coducted on 30 participants (15 male and 15 female). In the first phase of the research, 1-RM (one repetition maximum) of the dominant arm was measured. In the second phase, registration of changes in the amplitude of motor units action potentials was conducted during static contraction. Registration was performed twice, with time interval of 15 minutes. The second measurement was significantly shorter than the first. Analysis of EMNG-registration showed linear increase in MUAPamplitude in time. Significantly higher values of MUAPamplitude in the second measurements were registrated in both groups (p<0.05). Analysis of MUAPamlitude velocity change showed significantly higher values in the second measurement in males. There is no significant change in all registered values between males and females (p> 0.05).
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