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popliteal fossa & leg > anterior leg compartment > Flashcards

anterior leg compartment Flashcards

1
Q

what is the medial boundary of the anterior compartment?

A

tibia

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2
Q

what is the lateral border of the anterior compartment?

A

anterior intermuscular septum

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3
Q

What is the posterior of the anterior compartment?

A

interosseus membrane

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4
Q

What serves the anterior compartment?

A

anterior tibial artery/vein

deep fibular nerve.

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5
Q

What are the muscles in the anterior compartment from medial to lateral?

A 
tibialis anterior (L4,L5)
extensor hallicus longus (L5)
Extensor digitorum longus (L5,S1)
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6
Q

what is the origin of tibialis anterior?

A

upper 2/3 of lateral surface of tibia, interosseus membrane,
internal surface of
fascia cruris

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7
Q

What is the insertion of tibialis anterior?

A

medial and plantar surface of the medial cuneiform,

medial base of MT1

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8
Q

What is the action of tibialis anterior?

A

dorsiflexion of foot, at talocrural joint
inversion and supination of foot, at subtalar joint
supports medial longitudinal arch of foot

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9
Q

What is the origin of extensor hallicus longus?

A

middle third of the medial surface of the fibula,

interosseus membrane

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10
Q

what is the insertion of extensor hallicus longus?

A

dorsal aponeurosis of the hallux and the base of its distal phalanx

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11
Q

what is the action of extensor hallicus longus?

A

dorsiflexion of the foot, at talocrural joint

extension of hallux

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12
Q

what is the origin of the extensor digitorum longus?

A

lateral tibial condyle, head and anterior border of fibula, interosseus membrane

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13
Q

What is the insertion of the extensor digitorum longus?

A

by 4 slips to the dorsal aponeuroses of digits II-V and the bases of the distal
phalanges of those digits

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14
Q

What is the action of extensor digitorum longus?

A

dorsiflexion of the foot, at talocrural joint

extends digits 2-5

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15
Q

What is the fibularis tertius?

A

consists of inferiormost fibers of extensor digitorum longus that insert via a separate tendon on the dorsomedial surface of the fifth metatarsal instead of on the phalanges

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16
Q

What is the innervation and blood supply of fibularis tertius?

A

same as for E.D.L

17
Q

What are the actions of the fibularis tertius?

A

dorsiflexion and weak eversion of the foot.

18
Q

what does the tendons for the anterior compartment insert under?

A

superior and inferior extensor retinacula.

19
Q

what does the extensor retinaculm do to the anterior compartment force?

A

Retinacula reorient muscle force.

20
Q

what is shin splints?

A

Inflammation of anterior compartment muscles can impair circulation and impinge on deep fibular N,

21
Q

What is the foot inversion test?

A

test L4 (tibialis anterior)

22
Q

What is the hallux extension test?

A

test L5 (EHL)

popliteal fossa & leg (12 decks)

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