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Injury to the flexor tendons leads to inflammation, edema, and secondary compression of the surrounding tissues, similar to carpal tunnel syndrome. This makes it more difficult for the SDFT to glide over the surface of the joint, and the palmar annular ligament may thicken and adhere to the tendon sheath or SDFT, further reducing function of ...
Long toes force the horse to pivot (break over) further forward over the toe. The toe acts as a lever arm, and its increased length makes it harder for the heels to rotate off the ground. This increases strain on the deep digital flexor tendon and the ligaments of the navicular bone. [10] An abscess has ruptured out of the coronary band of this ...
Cross section of horse foot. The relevant areas are: 2. Second phalanx. 4. Coffin bone. 6. Navicular bone. 9. Deep digital flexor tendon. 16. Plantar cushion. 17. Hoof. Knowledge of equine forelimb anatomy is especially useful for understanding navicular syndrome. The navicular bone lies behind the coffin bone and under the small pastern bone ...
It is most commonly seen in the superficial digital flexor tendon (SDFT) in a front leg—the tendon that runs down the back of the leg, closest to the surface. Tendinitis creating a "bow" is uncommon in the deep digital flexor tendon (DDFT) of a front leg, but is not uncommon in the pastern and foot regions.
The main tendon in the hoof is the deep digital flexor tendon, which connects to the bottom of the coffin bone. The impact zone on the bottom of the hoof includes the sole, which has an outer, insensitive layer and a sensitive inner layer, and the frog, which lies between the heels and assists in shock absorption and blood flow.
A totally ruptured superficial digital flexor tendon (SDFT) will cause a visible drop in the angle of the fetlock. [57] Catastrophic ruptured tendons account for as much as 3% of all tendon injuries. [58] Tendinitis is inflammation of a tendon. Tendons connect muscles to bone and normally have an elastic property so that they can stretch.
A combination of forces (e.g. the tension of the deep digital flexor tendon and the weight of the horse) result in the deep digital flexor tendon literally pulling the dorsal face of the coffin bone away from the inside of the hoof wall, which allows the coffin bone to rotate.
Injury to this ligament is an important cause of lameness in performance horses. The suspensory is a modified muscle, the equine equivalent of the interosseous muscle, which contains both tendon fibers and residual muscle fibers. [1] Interosseous ligaments: connect the cannon bone to each splint bone.