Title :
Recruitment and decruitment of motor units activities of m. biceps brachii during isovelocity movements
Author :
Okuno, Ryuhei ; Akazawa, Kenzo
Author_Institution :
Dept. of Inf. Syst. Eng., Osaka Univ., Japan
Abstract :
The purpose of this study is to investigate behaviors of motor units of m. biceps brachii (biceps short head muscle) during flexion movements in a wide range of elbow joint angle. In this study, eight surface electromyograms (EMGs) were measured during flexion movements at constant angular velocity (isovelocity) and against constant torque in wide range (from 0 [deg] to 120 [deg]) of elbow joint angle with a surface electrode array. We identified action potentials of each motor unit and detected recruitment and decruitment of the identified motor units. We found 42 recruitments and 38 decruitments of the motor units in 42 experimental sessions with 6 subjects.
Keywords :
biomechanics; biomedical electrodes; electromyography; 1 mm; 2.54 mm; EMG; action potentials; biceps short head muscle; elbow; flexion movements; isovelocity movements; m. biceps brachii; motor units activities; muscle decruitment; muscle recruitment; surface electrode array; surface electromyograms; Elbow; Force measurement; Humans; Information systems; Motion measurement; Muscles; Recruitment; Systems engineering and theory; Torque measurement; Traction motors;
Conference_Titel :
Engineering in Medicine and Biology Society, 2001. Proceedings of the 23rd Annual International Conference of the IEEE
Print_ISBN :
0-7803-7211-5
DOI :
10.1109/IEMBS.2001.1020428