Talocrual
What bones involved in the talocrual joint are concave? Which ones are convex?
Talus is convex
Is there motion at the distal tibiofibular joint?
Yes, but very little motion exists (millimeters)
Name three static stabilizers of the proximal tibiofibular joint
Anterior Superior tibiofibular ligament
Posterior Superior tibiofibular ligament
LCL
What four ligaments make up the deltoid ligament?
1. Anterior tibiotalar ligament
2. Posterior tibiotalar ligament
3. Tibiocalcaneal ligament
4. Tibionavicular ligament
What type of joint is the distal tibiofibular joint?
Fibrous, syndesmotic - plane joint
Does the proximal tibiofibular joint have a joint capsule?
Yes
What are the open and closed packed positions at this joint?
Open - slight plantarflexion
Closed - full dorsiflexion
What helps hold the tibia and fibular together so they can hold onto the talus?
Mortise and interosseous membrane
Is there more mobility in the tibia or the fibula?
Fibula contributes to more mobility, tibia contributes to more stability and weight-bearing forces
What plane do adduction and abduction of the talocrual joint occur in and why?
Since the ankle is orientated at 90 degrees in anatomical position, abduction and adduction will occur in the transverse plane and not in the frontal plane.
What is the common mechanism of injury of a syndesmotic "high ankle" sprain?
External rotation and extreme dorsiflexion
Name three muscles that have an attachment at the fibula
Biceps femoris (head of the fibula)
Extensor hallicus longus (middle portion of fibula)
Extensor digitorum longus (anterior fibula & tibia)