The subscapularis muscle is thick with multiple bellies on the underside of the scapula. Its tendon is separated from the joint capsule by a bursa. It can be a key player in frozen shoulder and pitching restrictions.
Origin: subscapular fossa
Insertion: lesser tubercle of the humerus
Function: stabilization of the humeral head, internal rotation of the humerus
Tony Preston has a practice in Atlanta, Georgia where he sees clients.
He has written and taught about anatomy, trigger points and cranial therapies since the mid-90s.