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ORTHO 560 > ankle anatomy and biomech > Flashcards

ankle anatomy and biomech Flashcards

1
Q

the talocrural joint is dependent on the stability provided by what>

A

stability provided by the distal tib fib joint

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2
Q

how many DOF does the talocalcaneal joint have

A

1 DOF

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3
Q

explain the arthokinematics of the talocalanceal joint

A

calcaneus onto talus: convex on concve
DF: posterior glide
PF: anterior flide

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4
Q

what is the resting position of the talus-calcaneus joint

A

10 degree PF

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5
Q

what is the CPP of the talus-calcaneus joint

A

full DF

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6
Q

MOI for the ATFL?

A

excessive ankle inversion and pf

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7
Q

what muscles make up to Deltoid ligament

A

ant tibionavicular lig
ant tibiotalar lig
tibiocalcaneal lig
post tibiotalar lig

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8
Q

what is the DOF of the subtalar joint?

A

1 DOF; eversion/inversion

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9
Q

what is the RP of the subtalar jt

A

midrange eversion/inversion

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10
Q

what is the CPP of the subtalar jt

A

end range eversion/inversion

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11
Q

what is the capsular pattern of the subtalar joint?

A

inversion > eversion

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12
Q

how many DOF do the MTPs have?

A

2 DOF

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13
Q

what is the RP of the MTP

A

in lsight extension

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14
Q

what is the CPP of the MTPs

A

full extension

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15
Q

what is the capsular pattern of the MTPs

A

1st MTP extension >flexion

2nd-5th MTP flexion > extension

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16
Q

arthrokinematics of the MTP?

A

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

17
Q

what type of joint is the PIP and DIP?

A

modified sellar joint

18
Q

how many DOF does PIP and DIP have?

A

1 dof

19
Q

What is the RP of PIP/DIP?

A

slight flexion

20
Q

what is the CPP of the PIP/DIP?

A

Full extension

21
Q

what is the capsular pattern of PIP/DIP?

A

extension > flexion

22
Q

what glide is associated w/ flexion of PIP/DIP?

A

plantar glides

23
Q

what glide is associated w/ extension of PIP/DIP?

A

dorsal glides

24
Q

what provides static and dynamic support to the medial arch of the foot?

A

static: plantar aponeurosis and plantar ligament
dynamic: tibialis post/anterior, FDL, FHL, intrinsic plantar muscles of the foot

25
Q

what provides static and dynamic support to the lateral arch of the foot?

A

static: plantar ligament and plantar fascia
dynamic: peroneals

26
Q

what is the primary role of plantar fascia

A

helps support medial arch of the foot

and abs shock; prevents collapsing of foot w/ overpronation

27
Q

what is the windlass mechanism of the foot?

A

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

28
Q

when is the windlass effect maximal in gait?

A

in the push off phase where max MTP extension occurs

ORTHO 560 (7 decks)

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