212 
(f) 
(g) 
(h) 
(i) 
ANATOMY OF THE RABBIT. 
The subscapularis. Origin: Entire medial surface of the 
scapula. Insertion: Lesser tubercle of the humerus. 
The teres major. Origin: Dorsal portion of the axillary 
border of the scapula. Insertion: In common with the 
latissimus dorsi on the anterior surface of the humerus. 
The teres minor. Origin: Ventral portion of the axillary 
border of the scapula. Insertion: Greater tubercle. 
The muscle is closely associated with the infraspinatus but is 
separated from the teres major by the tendon of origin of the long head 
of the triceps. 
The coracobrachialis. Origin: Coracoid process. —_In- 
sertion: Distal portion of the upper third of the humerus on 
its medial surface. 
5. Muscles arising from the scapula and humerus and inserted 
on the proximal ends of the radius and ulna (extensors and flexors 
of the forearm), (Figs. 34, 35, 74). 
AY 
Extensor (anconaeus) group. The muscles arise for the 
most part behind the axis of the- humerus, and are inserted on the 
olecranon. 
(a) 
(b) 
(c) 
The extensor antibrachii parvus (anconaeus quartus). 
Origin: Fascia of the medial surface of the humerus.  Inser- 
tion: Medial surface of the olecranon. 
. The muscle should be divided, or detached from its origin, and re- 
flected. 
The anconaeus minimus (epitrochleonanconaeus). 
Origin: Medial epicondyle of the humerus. Insertion: 
Medial surface of the olecranon 
The triceps brachii. Origin in three poruons: 
Caput longum (anconaeus longus): Ventral portion of the 
axillary border ot the scapula. 
Caput laterale (anconaeus lateralis): Greater tubercle and 
related portion of the lateral surface of the humerus. 
Caput mediale (anconaeus medialis): Posterior surface of 
the humerus. 
The three portions are almost separate muscles. Insertion 
on the olecranon. 
