ankle and foot Flashcards
is the tibia medial or lateral?
medial
is the fibula medial or lateral?
lateral
is the tibia or fibular the weight bearing bone (aka which is bigger)
the tibia
what is the anterior compartment of the lower leg responsible for?
dorsiflexion
what is the lateral compartment of the lower leg responsible for?
eversion
what is the superficial posterior compartment of the lower leg responsible for?
plantar flexion
what movement does the distal tibio-fibular joint do?
none; its syndesmosis (immovable for the most part)
what movement does the talo-cural joint do?
dorsi and plantar flexion
what movement does the sub-talar (talo-calcaneal) joint do?
inversion and eversion
are are the bones of the rear-foot? (there are 4)
- distal tibia
- distal fibula
- talus
- calcaneus
what are the bones of the mid-foot?
the tarsal bones (cuboid, navicular, and cuneiforms)
what are the bones of the fore-foot?
metatarsals and phalanges
how do the mortise and tenon joint fit together?
interlock like pieces of wood
which sits lower on the ankle, the medial malleolus or the lateral malleolus?
the lateral malleolus
is inversion of the foot more common than eversion of the foot?
yes, due to the lateral malleolus sitting lower on the ankle
what are the two superior ligaments of the ankle (part of the syndesmosis)
- Anterior tibio-fibular
- Posterior tibio-fibular
what is the function of the two superior ligaments of the ankle?
hold two bones together
what are the three lateral ligaments of the ankle?
- anterior talofibular (ATFL)
- calcaneofibular (CFL)
- posterior talofibular (PTFL)
of the three lateral ligaments, which two are the major ones to get injured?
the anterior talofibular and the calcaneofibular
what is the job of the intra-articular ligaments?
keep the subtalar joint stable
what are the intra-articular ligaments?
- interosseous talo-calcaneal
- cervical ligament
why is it hard to diagnose injuries at the intra-articular ligaments?
because you can’t see them
what are the medial ligaments called?
the deltoid
what is the job of the medial ligaments? (two things)
they are the primary stabilizer of the medial side of the joint.
Restraint to eversion with dorsiflexion
why are the medial ligaments rarely injured in sports?
the ankle rarely rolls out (eversion)
what percentage of ankle sprains are to the lateral ligaments?
80-85%
which ligament is the primary restraint to plantar flexion?
ATFL
which ligament is the primary restraint to inversion?
CFL
what is the MOI to injure the distal tibia-fib (syndesmosis)
internal rotation/adduction of the foot
what are 5 s/s of a lateral ankle sprain
- swelling around lateral malleolus
- decreased ROM (due to swelling)
- point tender over ligaments
- discoloration
- can’t bear weight on joint
what is the MOI of a medial ankle sprain?
forced eversion/rolling the ankle out (stress was put on the deltoid)
which ligaments tend to get torn in a medial ankle sprain?
distal tib-fib joint (syndesmosis)
what is the maisonneuve fracture?
a spiral fracture to the proximal third of the fibula.
what is a the anterior drawer test used for?
ATFL (lateral sprain)
what is the talar tilt test used for?
CFL and deltoid
true or false: ankle taping is better than bracing.
false
what bone is the keystone of the longitudinal arch?
navicular
what bone is the keystone of the transverse arch?
3rd metatarsal
true or false: in over-protonators the navicular will drop from the arch.
true
what 4 bands of connective tissue make up the medial longitudinal arch?
- plantar fascia
- long plantar ligament
- short plantar ligament
- “spring” ligament
where does the plantar fascia spread to?
calcaneus to metatarsal heads