16.💗JOINTS OF THE FOOT – SUBTALAR, TALO-CALCANEO-NAVICULAR JOINTS. JOINTS OF THE FOOT WITH LIMITED MOVEMENT. INTERPHALANGEAL JOINTS. ARCHES OF THE FOOT. BIOMECHANICS. 💗

What bones articulate at the subtalar joint?

- Talus (inferior surface) and calcaneus (superior surface)

Describe the type of joint that the subtalar joint is.

A:
- Synovial joint, specifically a plane synovial joint.

What structures support the capsule of the subtalar joint?

- Posterior talocalcaneal ligament
- Medial talocalcaneal ligament
- Lateral talocalcaneal ligament
- Interosseous talocalcaneal ligament (within sinus tarsi)
- Calcaneonavicular ligament

What are the articulating surfaces of the subtalar joint covered with?

- Articular cartilage

What movements occur at the subtalar joint?

- Inversion and eversion of the foot

Which nerves supply the subtalar joint?

- Medial and lateral plantar nerves (plantar aspect)
- Deep fibular nerve (dorsal aspect)

Describe the talocalcaneonavicular joint in terms of its structure.

- Ball and socket joint formed by the talus, calcaneus, and navicular bone.

What movements are possible at the talocalcaneonavicular joint?

- Rotation movements, gliding movements, inversion, and eversion of the foot

Name three ligaments associated with the talocalcaneonavicular joint.

- Dorsal talonavicular ligament
- Plantar calcaneonavicular ligament
- Calcaneonavicular part of the bifurcate ligament

Which nerves supply the talocalcaneonavicular joint?

- Medial plantar nerve and deep fibular nerve
- Articular branches of the posterior tibial and fibular arteries

Describe the interphalangeal joints (IP joints) of the foot.

- Found between the phalanges of the foot.
- Hinge joints permitting flexion and extension.
- Each metatarsal (except the first) has two IP joints (proximal and distal).