Comparison of scapular rotational movements measures of Acromion marker cluster between patients with Shoulder impingement syndrome and healthy ones during humeral elevation in scapular plane

The purpose of this study was to investigate the compare to scapular rotational movement's measures of Motion analyzer and Acromion cluster between patients with Shoulder impingement syndrome and healthy persons during humeral elevation in scapular plane. 15 Patients (Males=7, Females=8) with Shoulder Impingement Syndrome (mean age= 46.6±14.242 years) and 13 healthy (Male=7, Female=6) with average age of 47.461±14.309 who participated in the study. They elevated humerous in scapular movement plane during 4 seconds with one-kilogram weight hand, using the VICON motion analyzer and Acromion marker cluster. The marker set and kinematics analysis were based on ISB protocol. Independent T-test statistical exam was used to compare nonimpaired subjects to the impingement group. Scapular rotational movements were described by upward rotation angle. The estimation of three-dimensional scapular attitudes using the method of calculation relative to the trunk is reproducible in the scapular movement plane during elevation and can be used to document the scapular behavior. During scapular plane elevation of the arm, the scapular movements showed a similar pattern of increasing posterior-tilt angle, increasing upward-rotation angle, and decreasing internal-rotation angle in both impingement and nonimpaired groups, but the amount of upward rotation among patients was significantly, decreased in the scapular plane (13.694 degrees ± 9.427, p=0.48). These results suggest that altered scapular rotational movements may be an important aspect of scapulohumeral rhythm in the impingement syndrome and must be take attention during assessment and treatment, specific in patients with shoulder pain