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.
Origin. - From the spines of the two or three posterior lumbar vertebrae and from the posterior sacral bones.
Insertion. - Into the side of the bones of the tail.
Action. - To move the tail to the side on which the muscle acts.
 
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