The metacarpophalangeal joint, commonly called the fetlock joint, is the joint between the cannon bone and the proximal phalanx, with the proximal sesamoid bones forming the back of the joint. It is a high-motion, high-load joint that experiences significant stress during locomotion and is critical for shock absorption and propulsion. While the fetlock joint is proximal to the navicular apparatus, injuries here (such as sesamoiditis or suspensory ligament issues) can change the way forces are transmitted down the limb and affect foot function. The superficial and deep digital flexor tendons pass behind this joint. This information is for educational purposes only. Always consult with a licensed veterinarian for diagnosis and treatment of your horse.
Chronic inflammation and remodeling of the proximal sesamoid bones from repetitive loading and suspensory ligament traction.
Chronic inflammation and remodeling of the proximal sesamoid bones from repetitive loading and suspensory ligament traction. Signs include: Chronic low-grade forelimb lameness; pain on palpation of the sesamoid bones; positive flexion test; enlarged, remodeled sesamoids on radiographs; seen in young racehorses and sport horses.; Consult veterinarian for specific symptoms.
See the Metacarpophalangeal Joint (Fetlock Joint) on our interactive 3D horse model. Open 3D Model