Mean scapular and clavicular rotations during humerothoracic coronal-plane abduction during arm elevation (minimum [min] to maximum [max]) and lowering (max to min). The solid line represents the mean values of the participants judged to have normal motion; the dashed line represents the mean values of the participants judged to have obvious dyskinesis during weighted test movements. The minimum values for humerothoracic abduction for the normal and abnormal groups were 6.2 and 3.7, respectively; the maximum values were 149.2 and 149.3, respectively. A, Scapular posterior tilting, with negative or decreasing values representing anterior tilting. B, Scapular upward rotation, with decreasing values representing downward rotation. C, Scapular external rotation, with decreasing values representing scapular internal rotation. D, Clavicular elevation, with decreasing values representing clavicular depression. E, Clavicular protraction, with decreasing values representing retraction. The clavicle remains retracted with respect to the coronal plane of the thorax and, therefore, exhibits negative values. Error bars indicate standard error. a Indicates P < .05.