|A diagram of the tendons and ligaments in the leg. Notice the|
suspensory ligament and deep digital flexor tendon. credit
The suspensory ligament runs down the back of the cannon bone, starting just below the knee or hock and divinding into two branches, ending at the pastern. The ligament supports the ankle when weight is put on it, though if too much pressure is applied, it may tear or rupture. This can occur in the front legs when jumpers or eventers mistep upon landing on the other side of an obstacle, stressing the ligament. Dessage horses will most likely injure their hind leg suspensory ligaments as they work off their hind ends.
Spotting an injury in the suspensory ligament can prove difficult, since part of it is covered by other structures and the horse may only display subtle signs of lameness, depending on the severity of the tear. The leg may be warm, swollen, and sensitive. The best way to tell is by having your veterinarian exam you horse. An utlrasound can readily discover how severe the damage is and even locate the exact place of the tear. X-rays can show if the bone is damaged as well.
Depending on the severity of the situation, your vet will recommend several things. He will most likely tell you to cold-hose the leg daily, give your horse a stall rest, hand walk him short distances, and slowly return to the usual workload. This can take as short as eight weeks, or as long as a year. In more severe cases, your vet may recommend surgery or shockwave treatment.
Regardless of how severe the injury is, you should do something to reduce inflammation. Most vets recommend phenylbutazone(bute) and Banamine. Natural alternatives, recommended by Nan Martin, include lemongrass and marjoram, which is known to not only reduce inflammation and aid the healing of muscles, but also alleviates pain.
The deep digital flexor tendon, as the name suggests, assists with flexon of the leg. It runs from the back of the leg to the bottom of the coffin bone. Most commonly, a sport horse will the tear the bottom part, which runs from the pastern to the hoof, when his weight passes over his toe and his heel lifts. This occurs when jumping or working at high speeds, such as in the gallop.
Because the injury can occur to the part of the tendon residing in the hoof, spotting this condition can be particularly hard. If it occurs in the pastern or above the heal, you may notice it due to heat and swelling. Otherwise, it can be next to impossible to notice it, even with ultrasound, unless you go to a clinic with a magnetic resonance imaging machine.
Just like with a torn ligament, you should cold-hose the injured area and give your horse a stall rest of about eight weeks if the tendon has only been spranged, or eight months or more if the tendon has been torn. Try to reduce the inflammation to aid healing and reduce pain. As I mentioned earlier, lemongrass and marjoram are commonly used to reduce pain and inflammation. Your vet may recommend special shoes. Don't rush things, and slowly work your way up the training schedule you had before the injury.
Stay tuned for Part 2 to read about three more common injuries.