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A draft horse sleeping while standing up. The stay apparatus is an arrangement of muscles, tendons, and ligaments that work together so that an animal can remain standing with virtually no muscular effort. [1] It is best known as the mechanism by which horses can enter a light sleep while still standing up. [2]
Horses use a group of ligaments, tendons and muscles known as the stay apparatus to "lock" major joints in the limbs, allowing them to remain standing while relaxed or asleep. The lower part of the stay apparatus consists of the suspensory apparatus, which is the same in both sets of limbs, while the upper portion differs between the fore and ...
Suspensory ligament of thyroid gland, also known as Berry's ligament Part of the suspensory apparatus of the leg of a horse . When the leg is supporting the horse's weight, this ligament supports the fetlock joint.
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.
Below the knee/hock, the tendon is superficial to the suspensory ligament, but deep to the SDFT. Fairly commonly injured by horses doing fast work, the DDFT is round in cross section. Superficial digital flexor : Runs down the back of the leg, behind the carpus and cannon, branches below the fetlock and inserts into the distal side of the 1st ...
Degenerative suspensory ligament desmitis, commonly called DSLD, also known as equine systemic proteoglycan accumulation (ESPA), is a systemic disease of the connective tissue of the horse and other equines. It is a disorder akin to Ehlers–Danlos syndrome being researched in multiple horse breeds.
The size and position of this bony lump determine whether a splint is likely to cause long-term lameness. The lump can interfere with the knee joint or the suspensory ligament, which runs down the back of the cannon bone. [50] Splints force 7% of racehorses to retire. [47] Luxations are joint dislocations and account for 8% of fatal injuries.
The callus formed due to splint bone injury can become large and put pressure on the suspensory ligament. Bone heals by formation of a callus over the defective area. Speed and quality of healing is directly related to the blood supply and fracture stability. Rest is required immediately following injury to reduce movement of the fracture site.