Flashcards in The ankle joint Deck (20)
What articulates at the ankle joint?
Tibia, Fibula, Talus
What type of joint is the ankle joint?
Hinge type synovial joint
What movements does the ankle joint allow?
What binds the Tibia and Fibula distally at the ankle joint?
What are the ligaments of the ankle joint?
What does the medial ligament of the ankle joint protect against?
Over eversion of the foot
What does the lateral ligament of the ankle joint protect against?
Over inversion of the foot
How many ligaments make the Medial ligament of the ankle?
How many ligaments make the lateral ligament of the ankle?
What are the ligaments that make the lateral ligament of the ankle called?
What is important to remember when looking at an ankle fracture?
It has a ring structure so is likely to break in more than one place
Which muscles cause Plantarflexion of the foot?
Muscles of the posterior compartment of the leg; Gastrocnemius, Soleus, Plantaris and Posterior tibialis
Which muscles cause dorsiflexion of the foot?
Muscles of the anterior compartment of the leg; Tibialis anterior, extensor Hallucis longus, extensor digitorum longus
What commonly effects the ankle?
How does an ankle sprain commonly occur?
Forced inversion of a plantarflexed weight bearing foot.
Which ligament is commonly damaged in an ankle sprain?
The lateral ligament
Why is the lateral ligament commonly damaged in an ankle sprain?
It is weaker than the medial ligament
It resists inversion
When does a Pott fracture-dislocation occur?
When the foot is everted
What are the 3 stages to a Pott fracture-dislocation?
1) Forced eversion fulls on medial ligaments, fracture of medial malleolus
2) Talus moves laterally, lateral malleolus breaks off OR fracture of the Fibula above tibiofibular joint
3) If tibia is pushed anteriorly, the talus shears off the distal proximal portion