A PTA places the patient in supine with the shoulder abducte…

A PTA places the patient in supine with the shoulder abducted to 90 degrees and the elbow flexed to 90 degrees. The forearm is placed perpendicular to the supporting surface. The palm of the hand is facing the feet. The humerus is stabilized on the examining table with use of towel to level the humerus with the acromion process. What goniometric measurement test position is best described above?