The plantar calcaneonavicular ligament is described as which of the following?

• A. Plantar calcaneonavicular ligament
• B. Side branch ligaments between hand bones and fingerbones
• C. Inferior pubic ligament
• D. Costoclavicular ligament

Answer: (A)

This item tests knowledge of a key foot ligament and its function. The plantar calcaneonavicular ligament, also called the spring ligament, runs on the plantar surface from the sustentaculum tali of the calcaneus to the navicular bone. Its main role is to support the head of the talus and help maintain the medial longitudinal arch during weight bearing, effectively acting like a spring that stores and releases energy as you stand and move.

The other options don’t describe this structure: ligaments between hand bones and fingers are digital ligaments, not a plantar foot ligament; the inferior pubic ligament is in the pelvis; and the costoclavicular ligament connects the first rib to the clavicle.