Foot and ankle arthrology Flashcards
What is the Talocrural Joint?
AKA mortise joint. It is the joint between the talus and tibia/fibula
What forms the mortise joint?
Medial and lateral malleolus (lego blocks)
What type of joint is the Distal (inferior) Tibiofibular joint?
Planar joint
What type of joint is the talocrural joint?
Hinge joint
What are the ligaments of the Distal Tibiofibular joint?
AITFL: anterior inferior tibiofibular lig
interosseous membrane
PiTFL: posterior inferior tibiofibular lig
What is the strong, thick, dense ligament which stabilizes the syndesmosis between the two bones?
PiTFL: posterior inferior tibiofibular lig
What helps stabilize the tibia and fibula to create the mortus for the talus to sit in?
AiTFL & interosseous membrane
is the talus CONVEX or CONCAVE?
Convex
is the distal tibia CONVEX or CONCAVE
Concave
When is there forces on the syndesmosis?
DF
What action causes post glide of talus in mortise?
DF
What causes gapping or separation of syndesmosis?
DF
Fibula glides POST when you
DF
What action causes an ANT glide of talus in mortise?
PF
What closes the syndesmosis?
PF
Fibula glides ANT when you?
PF
How does a high ankle sprain occur?
Hyper DF (snowboarding)
OR Eversion, Rotation & DF (most common way)
What gets damaged when you get a high ankle sprain?
Anterior tibiofibular ligament and the syndesmosis.
What are the ligaments of the medial ankle?
“deltoid” or medial collateral lig (3 parts)
What are the 3 parts of the Deltoid lig?
1) Tibiotalar (ant & post)
2) Tibiocalcaneal lig
3) Tibionavicular lig
What does the Deltoid lig resist?
Eversion force at talus, calcaneus and navicular bone (cause each of 3 ligs attaches to the three bones)