Subtalar Joint

Question 1

Articulating surfaces

Answer 1

Inferior surface of body of talus (posterior talar articular surface)
Superior surface of calcaneus (posterior calcaneal articular facet)

Question 2

Stability

Answer 2

Joint capsule strengthened by fibrous layer
Posterior talocalcaneal ligament
Medial talocalcaneal ligament
Lateral talocalcaneal ligament
Interosseous talocalcaneal ligament binds talus and calcaneal together (majority of stability)

Question 3

Movements

Answer 3

Eversion - lateral leg muscles

Inversion - tibialis anterior

Question 4

Neurovasculature

Answer 4

Arterial supply - posterior tibial + fibular arteries

Nerve supply - plantar aspect - medial or lateral plantar nerve // dorsal aspect - deep fibular nerve

Question 5

Calcaneal fracture

Answer 5

Crush type injuries, falling onto heel from a height
Comminuted fracture - breaks in many places
Shorter and wider in x-ray
Can cause chronic problems, arthritic joint, pain on inversion/eversion -> painful to walk on uneven ground