| Electromyographic Analysis of the Biceps Brachii during Provocative Tests |
| Young-Soo Lee, Dong-Bae Shin, Sang-Hyun Cho, Ki-Sun Nam, Sung-Jae Kim |
| Department of Orthopedic Surgery, Pundang CHA Hospital, College of Medicine, Pochon CHA University
Department of Rehabilitation Therapy, College of Health Science, Yonsei University
Department of Orthopedic Surgery, Yonsei University, College of Medicine |
| 상완 이두 건 병변에 대한 유발 검사시의 근전도 분석 |
| 이영수, 신동배, 조상현, 남기순, 김성재 |
| 포천 중문의과대학교 분당 차병원 정형외과학교실
연세대학교 보건과학대학 재활학과교실
연세대학교 의과대학 정형외과학교실 |
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| Abstract |
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The electromyographic activity of four muscles(biceps, supraspinatus, infraspinatus and subscapularis) was measured from non-dominant shoulders of 12 volunteers by six different provocative test for the biceps pathology. The provocative tests were Speed, Yergason, Ludington, Heuter, O'Brien and the abduction-extension test. Each test was performed in a force of 30% of maximal voluntary contraction. The levels of activity of the biceps were higher than those of the other rotator cuff muscles only in Speed's test: 28% in the biceps, 26% in the infraspinatus, 25% in the supraspinatus and 21 % in the subscapularis. The levels of activity of the biceps as a percent of MMT(maximal manual test) were higher in Speed's(42%) and O'Brien's test with the arm supinatecl(42%). Speed's test can isolate the activity of biceps better than the other tests but it is a nonspecific test by which the biceps tendon was also activated within other rotator cuff muscles. |
| Key Words:
Biceps brachii; Rotator cuffs; Provocative test; Electromyography
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