ankle anatomy and biomech Flashcards
the talocrural joint is dependent on the stability provided by what>
stability provided by the distal tib fib joint
how many DOF does the talocalcaneal joint have
1 DOF
explain the arthokinematics of the talocalanceal joint
calcaneus onto talus: convex on concve
DF: posterior glide
PF: anterior flide
what is the resting position of the talus-calcaneus joint
10 degree PF
what is the CPP of the talus-calcaneus joint
full DF
MOI for the ATFL?
excessive ankle inversion and pf
what muscles make up to Deltoid ligament
ant tibionavicular lig
ant tibiotalar lig
tibiocalcaneal lig
post tibiotalar lig
what is the DOF of the subtalar joint?
1 DOF; eversion/inversion
what is the RP of the subtalar jt
midrange eversion/inversion
what is the CPP of the subtalar jt
end range eversion/inversion
what is the capsular pattern of the subtalar joint?
inversion > eversion
how many DOF do the MTPs have?
2 DOF
what is the RP of the MTP
in lsight extension
what is the CPP of the MTPs
full extension
what is the capsular pattern of the MTPs
1st MTP extension >flexion
2nd-5th MTP flexion > extension
arthrokinematics of the MTP?
flexion: plantar glide of the phalynx
extension: dorsal glide of the phalynx
abd/add: relative to 2nd ray. for the 2nd phalynx use the midline as a reference point
what type of joint is the PIP and DIP?
modified sellar joint
how many DOF does PIP and DIP have?
1 dof
What is the RP of PIP/DIP?
slight flexion
what is the CPP of the PIP/DIP?
Full extension
what is the capsular pattern of PIP/DIP?
extension > flexion
what glide is associated w/ flexion of PIP/DIP?
plantar glides
what glide is associated w/ extension of PIP/DIP?
dorsal glides
what provides static and dynamic support to the medial arch of the foot?
static: plantar aponeurosis and plantar ligament
dynamic: tibialis post/anterior, FDL, FHL, intrinsic plantar muscles of the foot
what provides static and dynamic support to the lateral arch of the foot?
static: plantar ligament and plantar fascia
dynamic: peroneals
what is the primary role of plantar fascia
helps support medial arch of the foot
and abs shock; prevents collapsing of foot w/ overpronation
what is the windlass mechanism of the foot?
its a manner in which the plantar fascia manages to support the foot w/ WB.
by shortening the distance b/w heel and ball of foot tension in the fasica increases and stabilizes the arch
when is the windlass effect maximal in gait?
in the push off phase where max MTP extension occurs
