Upward fixation of the patella, often called a “locking stifle,” can look dramatic and alarming. A horse may suddenly appear unable to bend a hind leg, drag the toe behind, hesitate when stepping forward, or release the limb with a sudden snap. Learn what upward fixation of the patella is, how to recognize it, and how it is treated.

Learn the anatomy and function of the equine stifle, and its importance to soundness and performance