Plantar cuneonavicular ligaments

The plantar cuneonavicular ligaments are a group of short, robust ligaments located on the plantar aspect of the foot, connecting the navicular bone to each of the three cuneiform bones (medial, intermediate, and lateral). These ligaments reinforce the plantar capsule of the cuneonavicular joints and contribute to the stability of the medial longitudinal arch of the foot.

The plantar cuneonavicular ligaments originate from the plantar surface of the navicular and insert onto the plantar surfaces of the cuneiforms. The most prominent is the ligament between the navicular and the medial cuneiform, which is broad and thick, while the ligaments to the intermediate and lateral cuneiforms are generally thinner and shorter. These ligaments are closely associated with the insertion of the tibialis posterior tendon, which sends slips to the navicular and cuneiforms, further supporting the arch.