Page 61 - Adams and Stashak's Lameness in Horses, 7th Edition

Functional Anatomy of the Equine Musculoskeletal System 27

subtendinous bursa lies deep to the tendon of insertion Laterally the elbow is covered by the distal part of the
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of the long head of the triceps brachii muscle cutaneous omobrachialis muscle. A short, stout lateral
VetBooks.ir brachii also inserts on and acts to tense the deep ante­ of the humerus to the lateral tuberosity of the radius.
collateral ligament extends from the lateral epicondyle
(Figure 1.28). The medially located tensor fasciae ante­
The cranial part of the joint capsule is robust, but cau­
brachial fascia. The small anconeus muscle originates
from the lateral edge of the olecranon fossa, inserts on dally it becomes thinner as it extends into the olecranon
the olecranon, and is attached on its deep surface to the fossa deep to the anconeus muscle. The joint capsule is
elbow joint capsule, acting to elevate it when the joint is adherent to the anconeus muscle, the collateral liga­
extended. ments, and tendons of surrounding muscles. Extensions

Cutaneous omobrachialis m.
(cut and reflected)

Triceps brachii m.

Bursae

Lateral collateral ligament
of the elbow joint

Ulnar head of
deep digital
flexor m.
Extensor carpi radialis m.

Common digital extensor m.

Ulnaris lateralis m.
Lateral digital extensor m.

Figure 1.28. Lateral view of left elbow. Dashed lines represent the locations of bony elements. Note that the ulnaris lateralis is now called
extensor carpi ulnaris.