Cadaveric study of the superomedial protocol. (a) The entry point (white dot) was about 1 cm posterior to the distal clavicle and just medial to the acromion. It was about 3 cm away from the suprascapular nerve along the mediolateral axis. (b) and (c) The needle angle was 36° ± 7° lateral in the coronal plane (b) and 14° ± 8° anterior in the sagittal plane (c). A: acromion; DC: distal clavicle.