Normal Range of Shoulder Motion and Fluoroscopic Analysis of Motion Fraction |
Chang-Hyuk Choi, M.D., Gi-Hyun Yun, M.D. |
Department of Orthopaedic Surgery, School of Medicine,
Catholic University of Taegu-Hyosung, Taegu, Korea |
정상인의 견관절 운동범위 및 방사선 투시기를 이용한 운동분율측정 |
최창혁, 윤기현 |
대구효성가톨릭대학교 의과대학 정형외과학교실 |
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Abstract |
We measured, with manual goniometer, the active and passive arc of motion of the shoulder in 31 healthy male subjects who were right-hand dominant and who ranged in age from twenty to thirty-one years. Among ten directions through the four motion plane, the range of motion on the dominant side were significantly smaller than those on the non-dominant side in the motion of six directions. We also measured the motion fraction of the glenohumeral and scapulothoracic movement using fluoroscope in 30-degree intervals of arm elevation in the scapular plane. The ratio of glenohumeral to scapulothoracic movement(θGH/θST) was 1.6 for the full range of motion in scapular plane. At the lower angles of abduction, scapulothoracic movement was slight compared with glenohumeral movement. The motion fraction of scapulothoracic joint was increased from 60-degree to 150 degree of arm angle especially between 120 to 150 degree. During arm elevation, scapula was also extended from 42 degrees to 20 degrees tilting as well as internal rotation. The measuring technique of glenohumeral to scapulothoracic movement(θGH/θST) with fluoroscopy could be applied to the simple radiographic measurement at the out-patient clinic in order to identify the pathology and recovery of shoulder motion after treatment |
Key Words:
Shoulder; Arc of motion; Glenohumeral and scapulothoracic; Motion fraction |
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