What is the origin of the deep digital flexor tendon?

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The deep digital flexor tendon has multiple proximal origins across both the front and hind limbs. In the front leg, the deep digital flexor muscle begins on the humeral epicondyle and also from the radius and ulna. In the hind leg, it begins on the femur as well as the tibia and fibula. This broad origin sets up the tendon to descend and attach to the distal phalanx to flex the distal joints. Any option that omits one or more of these attachments isn’t a complete description of where the tendon originates, while the inclusive description covering both fore and hind limb origins matches the actual anatomy.