THE 
VETERINARIAN. 
VOL. III. 
OCTOBER, 1830. 
No. 84. 
ANATOMY OF THE HORSE. 
[Continued from page 485.] 
5.—POSTERIOR HUMERAL REGION, 
Comprehends a mass of muscle, at the back of the humerus, 
of considerable bulk, and partially divisible into three portions; 
on which accounts, and from its having different attachments, it 
is found most convenient, and indeed is most usual, to consider the 
muscle (which altogether has the name of Triceps Extensor 
Brachii) under three distinct heads or divisions. These heads 
are distinguished by epithets correspondent to their magnitude 
and importance. . 
TRICEPS EXTENSOR BRACHII. 
Having three divisions or heads : the first is the 
caput magnum. — Scapulo-ohcranius. 
Situation .—Infero-posterior part of the shoulder: occupying 
the angular interspace between the scapula and humerus. 
Form .—Broad; thick; triangular; flattened. 
Attachment .—Superiorly, to the whole of the posterior costa 
of the scapula: inferiorly, to the superior and posterior parts of 
the olecranon, and postero-internal part of the brachial faschia, 
immediately below that process. 
Direction .—Downwards and backwards; converging towaids 
the olecranon. 
Relations —Externally, with the faschia and skin, teres minor, 
and postea spinatus; internally, with the pectorales, magnus et 
parvus, and the teres major: anteriorly and inferiorly, with the 
caput medium and humerus ; superiorly and posteriorly with the 
scapula, and the faschia and skin. 
VOL. in. 4 D 
