The extensor process, where the suspensory branches insert, is located on which bone?

• A. Calcaneus
• B. Cannon bone
• C. Pedal bone
• D. Navicular bone

Answer: (C)

The extensor process is a small dorsal projection on the distal phalanx, the coffin bone inside the hoof. This is where the suspensory ligament’s medial and lateral extensor branches attach, helping form part of the navicular apparatus that stabilizes the coffin joint during weight bearing. Because this attachment point sits on the pedal bone, not the heel bone, the cannon bone, or the navicular bone itself, the pedal bone is the correct location.