Flashcards in Chapter 8 Ankle and Foot Deck (21)
Portion of talus that artciulates with ankle mortise?
Trochlea of talus
Which ankle motion is more stable, plantarflexion or dorsiflexion?
Dorsiflexion--bc talus is wider anteriorly
Talocrural joint (tibiotalar joint)?
Hinge joint bt talus and medial malleolus, and lateral melleolus
Main motions of talocrural joint?
Plantarflexion and dorsiflexion
What motion occurs with anterior glide of talus?
What motion occurs with posterior glide of talus?
80% of ankle sprains occur in plantarflexion or dorsiflexion?
Plantarflexion (due to stability of ankle in dorsiflexion)
What joint allows internal/external rotation of leg while foot is fixed?
Subtalar joint (talocalcaneal joint)
Arches of foot?
Longitudinal and transverse
Medial longitudinal arch?
Talus, navicular, cuneiforms, 1-3 metatarsals
Lateral longitudinal arch?
Calcaneus, cuboid, 4-5 metatarsals
Navicular, cuneiforms, cuboid
Where do most SDs occur in foot?
Transverse arch--often seen in long distance runners
Lateral stabilizers of ankle?
ATF, calcaneofibular, posterior talofibular
Most common injured ankle ligament?
Type I ankle sprain?
Type II ankle sprain?
ATF and calcaneofibular
Type III ankle sprain?
ALL 3 lateral ligaments
Excessive pronation usually results in what injury?
Fracture of medial malleolus (rather than pure ligamentous injury)
Calcaneonavicular ligament--strengthens medial longitudinal arch