Page 60 - Adams and Stashak's Lameness in Horses, 7th Edition

26 Chapter 1

Rhomboideus m. insertions Latissimus
Teres major m.
VetBooks.ir Serratus ventralis m. insertions dorsi m.

Suprascapular n. Subscapularis m.
Thoracodorsal n.
Ulnar n.
Subscapular n.
Radial n.

Median n.

Musculocutaneous n.

Axillary a.
Lateral
thoracic n.

Axillary n.

Cutaneus trunci m.
Subscapular a.
Proper axillary lymph nodes

Pectoralis ascendens m.
Tensor fasciae antebrachii m.
Combined median and
musculocutaneous n.n.
Caudal cutaneous antebrachial n.
Coracobrachialis m.
Biceps brachii m.
Cubital lymph nodes
Musculocutaneous n.

Medial cutaneous antebrachial n.
Flexor carpi ulnaris m.

Flexor carpi radialis m.
Figure 1.27. Medial view of left shoulder, arm, and proximal forearm. Veins are not depicted.

The terminal part of the brachialis muscle, curving the elbow joint deep to the cranial part of the transverse
around from its location in the musculospiral groove of pectoral muscle (Figure 1.26). Proximocaudal to the
the humerus, passes between the biceps brachii and joint the collateral ulnar artery and vein and the ulnar
extensor carpi radialis muscles to attach to the medial nerve with its cutaneous branch (caudal cutaneous ante­
border of the radius deep to the medial collateral liga­ brachial nerve) cross obliquely between the medial head
ment (Figure 1.26). A bursa lies between the tendon and of the triceps brachii and tensor fasciae antebrachii.
the collateral ligament. 30 All three principal extensors of the elbow insert on
The median nerve, brachial artery, and the two bra­ the olecranon tuberosity. A subcutaneous bursa may
chial veins lie caudal to the medial collateral ligament of cover the caudal aspect of the olecranon tuberosity; a