Week 9 - Talocrural joint

Question 1

Which part of the talus does the tibia and fibula articulate on, and what is the joint called?

Answer 1

The body of the Talus and it is called the Talocrural joint

Question 2

What other structure helps keep the Talocrural joint stable?

Answer 2

Interosseus membrane of the Tibia and Fibula keeps both bones together

Question 3

Talocrural joint

Type of joint, physiological movement, accessory movement?

Answer 3

Type of joint: Synovial joint
Physiological movement: Plantarflexion, dorsiflexion
Accessory movement: Talar body rolls in mortise, anterior posterior glide

Question 4

What is a mortise?

Answer 4

A carpenters mortise joint that is cut perfectly to wedge two pieces together

Question 5

Talus tilt

Answer 5

Not anatomical, it’s a way of describing excessing tild of the talus.

The talus cannot tilt in dorsiflexion due to the body of the talus being wider more anteriorly

Question 6

Is dorsiflexion or plantarflexion more stable at the Talocrural joint? and why?

Answer 6

Dorsiflexion, the Talus is wider more anteriorly so there is a wider base of support when the tibia and fibular glide anteriorly in dorsiflexion

Question 7

Lateral ligaments of the TCJ

Answer 7

Anterior talofibular ligament (ATFL)

Calcaneofibular joint (CFL)

Posterior talofibular ligament (PTFL)

Question 8

Anterior talofibular ligament (ATFL) attachments, limits and assisted by

Answer 8

Attachments:
Anterior: The neck of the talus
Posterior: Lateral malleolus

Limits: Inversion in plantarflexion

Assisted by: Fibularis longus and brevis

Question 9

Calcaneofibular ligament (CFL) attachments, limits and assisted by

Answer 9

Attachments:

Proximal: Lateral malleolus
Distal: The lateral surface of the calcaneus

Limits: Inversion

Assisted by: Fibularis longus and brevis

Question 10

Posterior talofibular ligament (PTFL) attachments, limits and assisted by

Answer 10

Attachments:

Lateral: Medial surface of Lateral malleolus
Medial: Posterolateral surface of talus

Limits: Dorsiflexion

Assisted by: talar body shape

Question 11

Medial ligaments of the ankle (deltoid)

Answer 11

Anterior tibiotalar, Posterior tibiotalar, Tibionavicular part, Tibiocalcaneal

Question 12

Sustentaculum tali and what muscle attaches on the inferior surface

Answer 12

A horizontal shelf that arises from the anteromedial portion of the calcaneus which supports the talus. The inferior surface has a groove for the tendon of flexor hallucis longus.

Question 13

Anterior tibiotalar attachments

Answer 13

Medial malleolus to the of the neck talus

Question 14

Posterior tibiotalar attachments

Answer 14

Medial malleolus to the body of the talus

Question 15

Tibionavicular attachments

Answer 15

Medial malleolus to the navicular bone

Question 16

Tibiocalcaneal attachments

Answer 16

Medial malleolus to the calcaneus