Page 64 - Adams and Stashak's Lameness in Horses, 7th Edition

30 Chapter 1

Shoulder joint
Deltoideus m. capsule
VetBooks.ir Supraspinatus m. (cut and reflected) Infraspinatus m.
(cut)
Teres minor m.
(retracted)

Infraspinatus m.

Subclavius m.

Radial n.
Lateral head of
triceps brachii m.
Deltoideus m. (cut) Axillary n.

Cleidobrachialis m. (cut)

Cranial cutaneous antebrachial n.
Long head
of triceps
brachii m. Extensor carpi radialis m.

Lateral cutaneous antebrachial n.
Lateral head of
triceps brachii m.
Caudal cutaneous antebrachial n.
Figure 1.30. Lateral aspect of right shoulder. Inset: Deeper dissection exposing shoulder joint.

aponeurotic origin from the supraspinous ligament from draws it either craniad or caudad, depending on the
the third to the tenth thoracic vertebrae and inserts on activity of the cervical or thoracic parts, respectively.
the tuber of the spine of the scapula. An aponeurosis Like the trapezius, the rhomboideus possesses cervical
joins the two parts of the trapezius. Innervated by the and thoracic parts. Lying deep to the trapezius, the rhom­
accessory nerve and dorsal branches of adjacent thoracic boideus cervicis originates from the funicular part of lig­
nerves, the trapezius muscle elevates the shoulder and amentum nuchae; the rhomboideus thoracis originates