ankle joint Flashcards
ankle joint type
modified hinge
ankle joint mvmt
dorsi and plantar flexion
components of pronation
abduction, eversion, dorsiflexion
components of supination
adduction, inversion, plantar flexion
deltoid lig
triangle shaped, strong, on the medial side, prevents excessive eversion
lateral lig
thinner, weaker, commonly sprained, prevents excessive inversion 3 parts: calcaneofibular ant talofibular post talofibular
ant and post inf talofibular ligs
connect the inf portion of the tib and fib together
helps lock the ankle in dorsiflexion
center of mass
ant to joint
dorsiflexed position
stability
eccentric contraction of triceps surae needed to prevent excess dorsiflexion
prime dorsiflexors
anterior crural compartment
- tibialis anterior
- extensor hallicus longus
- extensor digitorum longus
- fibularis tertius
combined action of fib tertius and tib anterior
dorsiflexes
tib ant inverts and fib tert everts so they cancel eachother out to produce pure DF
prime plantar flexors
triceps surae
- gastrocs
- soleus
- plantaris
inversion sprains and lig tears
far more common, weak lat lig
inversion test
common/deep fib nerve lesion
foot drop
superficial fibular nerve lesion
lateral compartment muscles
deep fibular n lesion
ant comp muscles, DFers, fairly superficial at neck of the fibula. trauma to neck causes damage here. foot drop
tibial n damage
terminal branch of sciatic
post comp m’s: difficulty DFing
toe walk test
L5 root damage
foot drop, DFing problems
S1 root damage
triceps surae, dragged foot
differentiating btw sprain and fracture
palpate posterior malleoli and base of MT5
if tender–> fracture
lig damage
compare R and L ankles for a difference
ant draw test
anterior talofibular ligament
talar tilt test
calcaneofibular lig
grasp talus btw thumb and first finger, varus force
squeeze test
pain upon compression of distal tib and fib
2-3 inches above ankle–>high ankle sprain
