Muscles of the Shoulder

[Up] [extrinsicmm.] [intrinsicmm.] [arteries] [nerves] [Equine digit]

[joints]  [image 1]  [image 2]  [image 3]  [image 4]   [brachium]  [forearm]

This image is similar to image 2, but the fascia has been cleaned away and some of the blood vessels have been cut to expose the teres minor muscle (A) and the axillary nerve. The axillary nerve supplies the deltoideus muscle, teres minor muscle and teres major muscle (next page), all of which flex the shoulder. More on that under [vessels,nerves].

The supraspinatus muscle (B) has also been exposed in this image. This muscle is an extensor of the shoulder. The supraspinatus and infraspinatus muscles are innervated by the suprascapular nerve. These muscles, as well as the subscapularis muscle, are important for stabilizing the shoulder joint, since this joint does not have collateral ligaments as do the other joints of the limb.

[Up] [extrinsicmm.] [intrinsicmm.] [arteries] [nerves] [Eq digit]