Correlation of muscle CSA measurements for craniocaudal force couple.

Table summarizes the results of the correlation of the cross-sectional area (CSA) measurements between the craniocaudal force couple (Sup. = M. supraspinatus and the deltoid (Delt. sup. = M. deltoideus, at the upper edge of glenoid; Delt. mid. = M. deltoideus, at the middle of the glenoid; Delt. inf. = M. deltoideus, at the lower edge of glenoid). CSA measurements of the rotator cuff muscles were performed at two different positions: the “y-position” and the “set position”.