ankle and foot Flashcards
where does the talocrural fibrous capsule attach
borders of articular surfaces of tibia and malleoli
to margins of trochlear surface of talus
wherer does the medial collateral (deltoid) ligament attach
medial malleolus to talus
navicular
sustentaculum tali of calcaneous
what is the function of the deltoid ligament
stabilizes joint
resists talocrural and subtalar eversion
where does the posterior talofibular lig attach
malleolar fossas of the fibula
lateral tubercule of talus
what does the posterior talofibular lig do
restricts talocrural inversion
where does the calcaneofibular lig attach
tip of lateral malleolus
lateral surface calcaneous
what does the calcaneofibular lig do
resists calcaneal/subtalar inversion
where does the anterior talofibular lig attach
anterior lateral malleolus of the fibula
neck of the talus
what does the anterior talofibular lig do
resists talocrural inversion and
anterior translation of talus
where does the long plantar lig attach
plantar surface calcenus and cuboid
to plantar surface bases of metatarsals
where does plantar calcaneocuboid lig (short plantar lig) attach
calcaneus
plantar surface of cuboid
where does plantar calcaneonavicular (spring lig) attach
anterior margin of sustentaculum tali
plantar surfaace naviular
what joint is considered the mortise
talocrural
which ligaments stabilizie the tibia and fibula
- interosseus membrane
- anterior inferior tibiofibular lig
what kind of joint is the talocrural
hinge
explain the talocrural joint
- convex talus
- concave distal tibia
what happens with talocrural DF during open chain
- posterior glide talus in mortise
- gapping or separation of syndesmosis
- fibula glides posterior
what happens with talocrural PF during open chain
- anterior glide talus in mortise
- closing of syndesmosis
- fibula glides anterior
what are the 3 parts of the deltoid lig
- tibiotalar
- tibiocalcaneal
- tibionavicular
what does the deltoid lig do
resists forced eversion of:
- talus
- calcaneous
- navicular
what are the 3 lateral ankle ligs
- ATFL
- CFL
- PTFL
which joints make up the rearfoot
- talonavicular
2. talocalcaneal (main)
what happens in the anterior rearfoot
- convex talus on concave calcaneous
- navicular bones
what happens in the talocacaneal joint
concave talus
convex calcaneus
what are the 3 subtalar planes of motion
- inversion/eversion
- DF/PF
- adduction/abd
what happens in NWB
calcaneus moves on talus
what happens in WB
talus moves on calcaneus
what happens with pronation NWB
- calcaneal eversion
- calcaneal abduction
- calceaneal DF
what happens with pronation WB
- calceaneal eversion
- talar adduction
- talar PF
what happens with supination NWB
- calceanal inversion
- calceanal adduction
- calceanal PF
what happens with supination WB
- calcaneal inversion
- talar abduction
- talar DF
with proximal and distal segments, what happens during supination
ER tibia
-inversion, adduction, PF foot
with proximal and distal segments, what happens during pronation
IR tibia
-eversion, abduction, DF foot
how can a spring lig rupture happen?
- acute trauma
- diaabetes
loss of medial long arch
-inferior migration of talus
describe metatarsophalangeal joints
synovial condyloid
- convex head of metatarsal
- concave based of prox phalanges
