Talocalcaneonavicular joint is the anterior joint between talus and calcaneum. It also involves the navicular bone. This joint is a compound, multiaxial synovial articulation.
Articular surfaces of Talocalcaneonavicular joint:
The articulation takes place between the rounded head of talus, the upper surface of sustentaculum tali, and the posterior surface of navicular bone. The joint is of synovial type, thus the articular surfaces are all covered with hyaline cartilage.
Capsule of Talocalcaneonavicular joint:
The capsule of this joint is poorly developed. The best developed portion of the capsule lies posteriorly, where it is thick and forms the anterior portion of the Interosseous ligament.
Ligaments of Talocalcaneonavicular joint:
There are two important ligaments associated with this joint, as explained below.
- Talonavicular ligament: it is a broad, thin band that connects the dorsal surfaces of the neck of talus and the navicular.
- Plantar calcaneonavicular ligament: It is a broad, thick band that connects the anterior margin of the sustentaculum tali to the plantar surface of the navicular bone. The superior surface of the ligament is covered with fibrocartilage and supports the head of the talus.
Synovial membrane of Talocalcaneonavicular joint:
The synovial membrane lines the capsule completely. The synovial cavity of this joint communicates with the talonavicular and talocalcaneal joints.
Nerve supply to Talocalcaneonavicular joint:
This joint receives its nerve supply from the deep peroneal and medial plantar nerves.
Movements of Talocalcaneonavicular joint:
The movements that occur at this joint include eversion and inversion of foot. They are described in detail at: Movements of Subtalar Joint