회전근개 전층파열 환자의 등속성 외전 운동 시 각속도에 따른 견관절 주위근 활성도 변화 = The Changes of Shoulder Muscle Activities by Angular Velocities of Isokinetic Abduction in Full-Thickness Rotator Cuff Tears

다국어 초록 (Multilingual Abstract)

This study investigated the differential muscular firing patterns of the shoulder muscles in patients with full-thickness rotator cuff tear. Eleven patients with unilateral rotator cuff tear were recruited. During isokinetic exercises, the muscular activities of upper trapezius, serratus anterior and lateral deltoid were recorded by surface EMG. Subjects performed isokinetic shoulder abduction of 60°/sec, and 180°/sec. The mean EMG amplitude of root mean square (RMS) was calculated to a percentage of maximal activity for each muscle. In the rotator cuff tear sides, the muscular activities of lateral deltoid in abduction were increased in 180°/sec compared to 60°/sec. And the EMG activities of upper trapezius and serratus anterior in the lesion side were significantly decreased compared to sound side in abduction of 180°/sec. But, in the case of lateral deltoid, the EMG activities were not different between sound and lesion sides in abduction of 180°/sec.

참고문헌 (Reference)

1 Carpentier A, "Velocity-dependent muscle strategy during plantarflexion in humans" 6 : 225-233, 1996

2 Paletta GA,Jr, "Shoulder kinematics with two-plane X-ray evaluation in patients with anterior instability or rotator cuff tearing" 6 : 516-527, 1997

3 Scibek JS, "Shoulder kinematics in patients with full-thickness rotator cuff tears after a subacromial injection" 17 : 172-181, 2008

4 Inman VT, "Observations on the function of the shoulder joint" 26A : 1-32, 1944

5 Zuckerman JD, "Normal shoulder proprioception and the effect of lidocaine injection" 8 : 11-16, 1999

6 Poppen NK, "Normal and abnormal motion of the shoulder" 58 : 195-201, 1976

7 Michiels I, "Kinematics of shoulder abduction in the scapular plane. On the influence of abduction velocity andexternal load" 10 : 137-143, 1995

8 Greenfield BH, "Isokinetic evaluation of shoulder rotational strength between the plane of scapula and the frontal plane" 18 : 124-128, 1990

9 Mont MA, "Isokinetic concentric versus eccentric training of shoulder rotators with functional evaluation of performance enhancement in elite tennis players" 22 : 513-517, 1994

10 Yamaguchi K, "Glenohumeral motion in patients with rotator cuff tears: a comparison of asymptomatic and symptomatic shoulders" 9 : 6-11, 2000

11 Kibler WB, "Evaluation of apparent and absolute supraspinatus strength in patients with shoulder injury using the scapular retraction test" 34 : 1643-1647, 2006

12 Bagg SD, "Electromyographic study of the scapular rotators during arm abduction in the scapular plane" 65 : 111-124, 1986

13 Laursen B, "Effect of speed and precision demands on human shoulder muscle electromyographyduring a repetitive task" 78 : 544-548, 1998

14 Mell AG, "Effect of rotator cuff pathology on shoulder rhythm" 14 : 58S-64S, 2005

15 Kelly BT, "Differential patterns of muscle activation in patients with symptomatic and asymptomatic rotator cuff tears" 14 : 165-171, 2005

16 Yanagawa T, "Contributions of the individual muscles of the shoulder to glenohumeral joint stability during abduction" 130 : 021024-, 2008

17 Soslowsky LJ, "Biomechanics of the rotator cuff" 28 : 17-30, 1997

18 Magermans DJ, "Biomechanical analysis of tendon transfers for massive rotator cuff tears" 19 : 350-357, 2004