Talocrural Joint

Question 1

Type of joint

Answer 1

Synovial uniaxial hinge, capable of one degree of freedom

Question 2

Bones involved

Answer 2

• distal ends of tibia
• inner aspects of both lat (fib) and med (tib) malleoli
• distal end of talus body

Question 3

Movements available

Answer 3

Plantarflexion

Dorsiflexion - most stable in CPP

Question 4

Functions

Answer 4

• Gives stable base of support
• Provides rigid lever for push-off
• Absorbs shock of body weight
• Flexibility to conform foot to irregular terrain
• Important for balance etc
• Allows adjustment of line of gravity when standing
• Ability to propel and restrain in walking

Question 5

Medial Collateral Ligaments MCL

Answer 5

Medial (deltoid) ligts (mass of 4 ligts)
-prevents unwanted eversion/abduction of heel/hind foot

Triangular shape all start at apex of med malleolus, post to ant:

• post tibiotalar part= to medial tubercle of talus
• tibiocalcaneal part= to sustentaculum tali of calcaneus bone
• tibionavicular part= to tuberosity of navicular bone
• anterior tibiotalar part= talus bone

Question 6

Lateral Collateral Ligaments LCL

Answer 6

Prevent inversion/adduction of heel/hind foot

Ant talofibular
-lat malleolus to talus

Post talofibular
-malleolar fossa (med surface of lat mall) to posterolateral talus

Calcaneofibular (obliquely directed)
-apex of lat mall to lat surface of calcaneus