Flashcards in Ankle Joint and Foot Deck (16)
What three bones make up the 'proper ankle joint'? What movement does this allow?
Tibia, fibula and talus. This is a hinge joint that allows movement in one plane, dorsiflexion and plantarflexion.
What is the subtalar joint? What movement occurs?
Joint between the inferior talus and calcaneous bones. Here inversion and eversion occurs.
Why is dorsiflexion more stable then plantarflexion?
Because the dome of the talus is wider anteriorly, fitting better into the joint in the dorsiflexed position.
What ligaments stabilise the ankle joint?
anterior/posterior tibiofibular ligament
interosseous ligament (interosseous membrane)
Lateral Ligaments: Ant/post talofibular ligament and calcaneofibular ligament
What runs posterior to the lateral malleolus?
structures from lateral compartment
What runs posterior to the medial malleolus?
Structures from posterior compartment
What would be the outcome of a syndesmotic or fibula break in regards to the joint? What could this lead to?
The talus would have increased space to freely move. This will likely result in articular cartilage damage, early onset arthritis
What is the nervous supply to the foot?
Medial and lateral plantar nerves from the tibial nerve
What is the arterial supply to the foot?
Medial and lateral plantar arteries from Posterior tibial artery (and dorsalis pedis)
Is the deltoid or lateral ligaments stronger/tougher?
The deltoid ligaments
What makes up the syndesmotic tibiofibular joint
Interosseous membrane and ant/post tibiofibular ligaments
The part of the talus that articulates with the tibia/fibula is?
The 'tala dome' or 'dome of talus'
Purpose of calcaneous?
To support/stabilize the talus
The sustentaculum tali is a medial projecting prominence of the calcaneus,, that specifically supports the HEAD of the talus
How many layers of the plantar surface of the foot are there, and how are they numbered
Four. They are numbered 1-4, from superficial to deep.