These connect the anterior margin of the sustentaculum tali of the calcaneus to the plantar surface of the navicular bone.

[2] The dorsal or superomedial component of the ligament presents a fibrocartilaginous facet, lined by the synovial membrane, upon which a portion of the head of the talus rests.

This ligamentous complex not only serves to connect the calcaneus and navicular bone, but supports the head of the talus, forming part of the articular cavity in which it is received.

A sprain to the plantar calcaneonavicular ligament can result in flatfoot deformity, which can impair mobility.

This article incorporates text in the public domain from page 355 of the 20th edition of Gray's Anatomy (1918)