The "'subscapular artery "'branches from the third part of the axillary and supplies the subscapularis muscle in the subscapular fossa as far as the inferior angle.
22.
The infraspinatus and teres minor fuse near their musculotendinous junctions, while the supraspinatus and subscapularis tendons join as a sheath that surrounds the biceps tendon at the entrance of the bicipital groove.
23.
The infraspinatus and subscapularis have significant roles in scapular plane shoulder abduction ( scaption ), generating forces that are two to three times greater than the force produced by the supraspinatus muscle.
24.
It seemed to be a minor tear of the subscapularis tendon, one of the tendons that make up the rotator cuff, so his physician initially advised seeing if it would heal on its own.
25.
Even though the supraspinatus is the most commonly injured muscle of the four muscles in the rotator cuff, the other three muscles that comprise the rotator cuff are the infraspinatus teres minor, and subscapularis.
26.
Irritation or entrapment of the lower subscapular nerve, which innervates the subscapularis and teres major muscles, will produce muscle guarding at the shoulder that will restrict motion into external rotation, abduction, or flexion.
27.
As the artery passes over the superior transverse scapular ligament, it sends a branch into the subscapular fossa, where it ramifies beneath the subscapularis, and anastomoses with the subscapular artery and with the dorsal scapular artery.
28.
Beside his continuous clinical activity, he has also described novel surgical procedures such as the Latisimus dorsi transfer for a pseudoparalytic shoulder and he has described several important pathologies, such as the isolated rupture of the subscapularis tendon.
29.
Zarins said he made an incision about an inch and a half ( 4 centimeters ) long, found a small tear in the bicep tendon next to the subscapularis and then made a second, smaller incision and repaired both.
30.
To stop this compressing against the undersurface of the acromion the humeral head and injuring the supraspinatus tendon, there is a simultaneous contraction of some of the muscles of the rotator cuff : the infraspinatus and subscapularis primarily perform this role.
