THE 
VETERINARIAN. 
voi.. in. APRIL, 1830. No. as. 
ANATOMY OF THE HORSE. 
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[Continued from page 124.] 
MUSCLES OF THE THORAX. 
1.—D ORSO-SCAPULAR REGION. 
THE muscles included in this region form three of the princi¬ 
pal agents concerned in the motions of the scapula. 
% 
trapezius .— Dorso-acromialis. 
Situation .—Upon the side of the withers. 
Figure .—A right-angled triangle ;• with the base turned up¬ 
wards, and the right side forwards, in a parallel line with the 
spine of the scapula. 
Attachment .—Superiorly, to the spinous processes of the 3d, 
4th, 5th and Gth dorsal vertebrae, and from the ligament and 
faschia investing them; inferiorly, to a small tubercle upon the 
spine of the scapula. 
Relations .—Superiorly, it covers the rhomboideus brevis; in 
its course, downward, it passes over the posterior costa of the 
scapula ; and also the postero-superior angle of the lgtissimus 
dorsi: inferiorly, it lies upon the aponuerosis enveloping the 
dorsum scapulae. 
Direction .—Perpendicular: excepting the posterior fasciculi, 
and they slant forward, in their course downward. 
Structure .—Superior attachments, aponeurotic; below, it ends 
in a flat triangular tendon; the intermediate parts are entirely 
fleshy. 
Action .—To elevate the scapula: and, when the posterior 
fasciculi prevail, to incline the bone at the same time, backwards. 
latissimus dorsi .— Dorso-humcra/is. 
Situation. —Upon the supero-lateral part of the chest, behind 
the scapula. 
vol. in. c c 
