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 muscle lies on the inner and back part of the radius or forearm, with which it is in contact.
Origin - From the inner surface of the internal condyle of the humerus-or upper-arm bone.
Insertion. - The tendon of insertion commencing some distance above the knee passes over a groove on the lower extremity of the radius, and is there surrounded by a synovial membrane; continuing downwards, it becomes inserted into the head of the inner small metacarpal bone.
Action. - To flex the knee-joint.
 
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