A PTA is performing joint mobilizations to increase a patien…

A PTA is performing joint mobilizations to increase a patient’s shoulder abduction range limited by a tight joint capsule. During the stretch, the swinging bone (the humerus) moves upward into abduction. According to arthrokinematic principles, when stretching is used to increase ROM due to a tight joint capsule, what occurs on the side toward the motion of the swinging bone?

A PTA observes a patient performing active shoulder abductio…

A PTA observes a patient performing active shoulder abduction in sitting. As the arm elevates, the patient demonstrates early superior translation of the humeral head, causing discomfort. The supervising PT explains that during normal shoulder abduction, the rotator cuff helps center the humeral head by producing an inferior slide to counteract the upward pull of the deltoid. Which group of muscles is primarily responsible for generating this stabilizing inferior glide?