The extensor branch of the suspensory ligament joins the

The extensor branch of the suspensory ligament joins the

• A. SDF
• B. DDF
• C. Common digital extensor
• D. Interosseous muscle

Answer: (C)

The stay apparatus relies on a coordinated connection between the suspensory structures and the extensor mechanism to keep the fetlock extended under weight. The extensor branch of the suspensory ligament runs to the dorsal side of the limb and blends with the tendon of the common digital extensor. This union creates a continuous extensor sling across the fetlock, helping prevent flexion from collapsing the joint when the horse bears weight. That’s why the extensor branch joins the common digital extensor. The other tendons and structures mentioned are not part of this dorsal extensor connection: the superficial and deep digital flexor tendons lie on the palmar/plantar side and flex the limb, not extend it, and the interosseous muscle is a broader component of the suspensory apparatus rather than the Tendon-to-tendon fusion described here.

The stay apparatus relies on a coordinated connection between the suspensory structures and the extensor mechanism to keep the fetlock extended under weight. The extensor branch of the suspensory ligament runs to the dorsal side of the limb and blends with the tendon of the common digital extensor. This union creates a continuous extensor sling across the fetlock, helping prevent flexion from collapsing the joint when the horse bears weight. That’s why the extensor branch joins the common digital extensor.

The other tendons and structures mentioned are not part of this dorsal extensor connection: the superficial and deep digital flexor tendons lie on the palmar/plantar side and flex the limb, not extend it, and the interosseous muscle is a broader component of the suspensory apparatus rather than the Tendon-to-tendon fusion described here.