This section is from the book "The Horse - Its Treatment In Health And Disease", by J. Wortley Axe. Also available from Amazon: The Horse. Its Treatment In Health And Disease.
Situated beneath the muscle last described.
Origin. - From the posterior border, and the lower part of the outer surface of the scapula.
Insertion. - Into the lower part of the bony ridge beneath the outer tubercle of the humerus.
Action. - To abduct the arm and rotate it outwards. Acting with the teres major, it bends the upper arm on the scapula.
 
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