Flashcards in The Foot and Ankle Deck (83)
What is the ankle joint formed by?
Articulation between the distal tibia & fibula with the talus.
What type of joint is the ankle joint?
Synovial hinge joint.
What movements does the ankle joint permit? (2)
What is dorsiflexion?
Pointing the foot upwards.
-dorsum towards shin
What is plantar flexion?
Pointing foot downwards.
-dorsum away from shin
Give 2 example of synovial joint problems that affect the ankle.
What helps to stabilise the ankle? (2)
-Good congruity between malleolar mortice and trochlea (talus)
-Very strong ligaments
Where is the trochlea (talus) widest?
What is the malleolar mortice?
Rectangular socket formed by the flat surface of the talus and the 2 malleoli (tibia & fibula).
How do the malleolar mortice and the trochlea of the talus help to stabilise the ankle during dorsiflexion?
During dorsiflexion, anterior trochlea moves between malleoli
>>spreads tibia and fibula slightly
>>increases their grip on talus.
What is the most stable position of the ankle joint?
What are the lateral ligaments of the ankle? (3)
-Posterior talofibular ligament
-Anterior talofibular ligament
Which anterior ligament tends to be weaker and what are the consequences?
Anterior talofibular ligament tends to be weaker.
How many medial ligaments are there at the ankle?
What are the attachments of the medial ligament?
Attached to the medial malleolus, then fans out >> talus, navicular and calcaneus.
What is the medial ligament also called?
What other structures help to stabilise the ankle? (2)
-Distal interosseous membrane
-Anterior & posterior tibiofibular ligaments
What movements are possible at the ankle? (4)
What angle does dorsiflexion occur to?
What muscles are involved in dorsiflexion?
Anterior compartment of the leg.
Which nerve supplies the anterior compartment of the leg?
Deep fibular (peroneal) nerve.
Which artery supplies the anterior compartment of the leg?
Anterior tibial artery.
What angle does plantar flexion occur to?
What muscles are involved in plantar flexion?
Posterior compartment of the leg.
Which nerve supplies the posterior compartment of the leg?
Which artery supplies the posterior compartment of the leg?
Posterior tibial artery.
What is inversion?
Pointing sole of foot medially.
Which joints are involved in inversion?
Primarily subtalar joint (not ankle).
-some movement in tranverse tarsal joint
Which nerve roots are involved in inversion?
L4 & L5.