The subscapularis is often involved in many patients experiencing shoulder problems, but is often overlooked in treatment. Burgmuller Op 109 Pdf Printer. Therefore, it is important to routinely check this muscle, particularly when working with patients who have difficulty lifting their arm overhead or reaching behind their back. Metro A Responsive Theme For Phpbb 3 Themes Of The Declaration more. Epson Tm-t88iii Serial Port Driver here. The subscapularis should also be examined when treating supraspinatus tendonitis, frozen shoulder or shoulder impingement conditions.

Treating this muscle is often the key to completely restoring full range of motion for those conditions. The subscapularis muscle is one of the four rotator cuff muscles, but is less accessible to palpate and needle than the other rotator cuff muscles. The thick belly of the subscapularis is located on the anterior surface of the scapula and fills almost the entire front surface of the shoulder blade. The subscapularis tendon passes across the front of the shoulder joint and attaches to the humerus at the lesser tubercle between the biceps tendons and deep to the deltoid muscle.

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This means the bulk of the muscle lies between the ribs and the scapula. It is essentially sandwiched between the serratus anterior and pectoralis major muscles on the anterior and the teres major and latissimus dorsi muscles at the posterior. Its action is to internally rotate and adduct the humerus, which means that this muscle is activated with swinging the arms across the body while walking, forehand and backhand tennis strokes, throwing, rowing, swimming (front crawl) and in a rounded shoulder posture. The other important function of the subscapularis is to pull the head of the humerus downward and compress the head of the humerus in the glenoid fossa. This prevents the head of the humerus from moving too far superior and anterior in the shoulder joint when the arm is raised. Imagine the origin of the subscapularis pulling closer to the insertion on the greater tubercle. This line of force pulls the subscapularis into the shoulder joint.

When the subscapularis becomes hypertonic, the humeral head is compressed into the glenoid fossa resulting in loss of motion (abduction and lateral rotation). Tension and trigger points in this muscle can cause painful and progressive loss of shoulder motion resulting in symptoms of frozen shoulder.