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.
This is a small flat band lying deep in the substance of the thigh behind.
Origin.- -From the under surface of the ischium in front of the tuberosity.
Insertion. - Passing in a forward and downward direction it becomes inserted into the posterior aspect of the femur, a little below the bony projection (trochanter minor internus) on the inner side of the bone.
Action. - To extend the femur on the pelvis and adduct the leg.
 
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