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Sesamoid bones: Bones embedded within a tendon. The horse's proximal digital sesamoids are simply called the "sesamoid bones" by horsemen, his distal digital sesamoid is referred to as the navicular bone. Ligaments and tendons hold the skeletal system together. Ligaments hold bones to bones and tendons hold bones to muscles.
Bones are connected to muscles via tendons and other bones via ligaments. Bones are also used to store minerals, and are the site of red blood cell formation. The Appendicular system includes the limbs of the horse; The Axial system is composed of the spine, ribs and skull;
The coffin bone. The hoof of the horse contains over a dozen different structures, including bones, cartilage, tendons and tissues. The coffin or pedal bone is the major hoof bone, supporting the majority of the weight. Behind the coffin bone is the navicular bone, itself cushioned by the navicular bursa, a fluid-filled sac.
Tendons attach muscles and bone, and are classified as flexors (flex a joint) or extensors (extend a joint). However, some tendons will flex multiple joints and extend another (the flexor tendons of the hind limb, for example, will flex the fetlock, pastern, and coffin joint, but extend the hock joint).
Medical problems that are more common in horses with long, sloping pasterns include: Bowed tendon; Sesamoiditis; A fracture of the sesamoid bones found at the back of the fetlock, should the joint hyperextend to the point where it touches the ground. This is especially likely if the horse is tired, such as at the end of a race.
Blanketing – or rugging as it’s called in Britain – is a bone of contention among horse owners. Horses are very good at maintaining their body temperature at around 38ºC come rain or shine.
Sagittal section of a wild horse hoof. Pink: soft tissues; light gray: bones (P2, P3 and navicular bone); cyan: tendons; red: corium; yellow: digital cushion; dark gray: frog; orange: sole; brown: walls) The third phalanx (coffin bone; pedal bone; P3;) is completely (or almost completely) covered by the hoof capsule. It has a crescent shape and ...
Nuclear scintigraphy, or the "bone scan," involves injecting a radioactive substance, often technetium-99, [44] into the horse and then measuring uptake, which is strongest in the areas of rapid bone remodeling. The bone scan is often useful for lameness that can't be easily localized to one area, that affects multiple limbs, or lameness that ...