4/12/2012 1 The leg The leg Dr. Rania Sherif Lecturer of Anatomy, Mansoura university Dorsiflexion Extension Planter flexion Flexion Inversion Eversion Flexion Extension Sciatic Nerve Sciatic Nerve Sciatic nerve Medial popliteal n Or Tibial n Superficial peroneal n Or Musculcutaneous n Posterior tibial n Lateral popliteal n Or Common peroneal n Deep peroneal n Or Anterior tibial n
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4/12/2012
1
The legThe legDr. Rania Sherif
Lecturer of Anatomy, Mansoura university
Dorsiflexion
Extension Planter flexion
Flexion Inversion Eversion
Flexion Extension
Sciatic NerveSciatic NerveSciatic nerve
Medial popliteal nOr
Tibial n
Superficial peroneal n
Or
Musculcutaneous n
Posterior tibial n
Lateral popliteal nOr
Common peroneal n
Deep peroneal n
Or
Anterior tibial n
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Lat Med
Ant 4Extensor
Post 7Flexor
Deep peroneal n
Superficial peroneal n
Tibial n (4)Posterior tibial n (4)
Dorsiflexion of foot (extension)
Planter-flexion of foot (flexion)
Planter-flexion
Inversion except 1 (subtalar joint)
Inversion
EversionAnterior GroupAnterior Group
Tibialisanterior
Peroneus tertius
Extensor hallucis longus
Extensor digitorum longus
Tibialisanterior
Peroneus tertius (1/4)
Extensor hallucis longus
(2/4)
Extensor digitorumlongus (3/4)
1 tibia (lat surface)
3 fibula (ant surface)
Tibialis anteriorTibialis anteriorOrigin:Lat surface of tibia (upper ½ )Insertion:Medial cuneiform boneBase of 1st metatarsal bone
NS: deep peroneal n
Action:DorsiflexionInversion
Origin:Ant surface of fibula (upper ¾)Insertion:Divide into 4 tendonsBases of Middle & distal phalanxof lateral 4 toes (extensorexpansion)NS: deep peroneal nAction:Dorsiflexion of footInversion of footExtension to all joints of lateral 4toes
Extensor hallucis longusExtensor hallucis longusOrigin:Ant surface of fibula (middle2/4)Insertion:Base of Distal phalanx of bigtoeNS: deep peroneal nAction:Dorsiflexion of footInversion of footExtension to all joints of big toe
Peroneus tertiusPeroneus tertiusOrigin:Ant surface of fibula (lower ¼ )Insertion:Dorsal surface of base of 5th
metatarsalNS: deep peroneal nAction:Dorsiflexion of footEversionEversion ofof footfoot
Lateral GroupLateral GroupPeroneus brevis
Peroneus longus
Peroneus longusPeroneus longusOrigin:Lat surface of fibula (upper2/3)Lat surface of head of fibula
Pass in groove on undersurfaceof cuboid boneInsertion:Medial cuneiform boneBase of 1st metatarsal boneNS: superficial peroneal nAction:Planter-flexion of footEversion of footMentainMentain archesarches ofof thethe footfoot
Peroneus brevisPeroneus brevisOrigin:Lat surface of fibula (lower 2/3)Insertion:Base of 5th metatarsal boneNS: superficial peroneal nAction:Planter-flexion of footEversion of foot
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Posterior GroupPosterior Group
Gastrocnemius
Plantaris
Tendocalcaneus
Achilles Tendon
Tibialisposterior
Flexor digitorumlongus
PopliteusGastrocnemiusGastrocnemiusOrigin:Medial head:popliteal surface abovemedial condyleLateral head: above lateral epicondyleInsertion:TendocalcaneusMiddle of post surface of calcaneusNS: medial popliteal n (tibial n)
Action:PlanterflexionFlexion of knee joint
SoleusSoleusOrigin:Back of Head of fibulaPosterior surface of fibulaTendenous archSoleal lineMedial border of tibiaInsertion:TendocalcaneusMiddle of post surface of calcaneusNS: (tibial) + post tibial nAction:PlanterflexionPropelling force in walkingSteady leg on groundHelp venous return from LL
PlantarisPlantarisOrigin:Popliteal surface above lateralcondyleInsertion:TendocalcaneusOr Middle of post surface ofcalcaneus
NS: medial popliteal n (tibial n)
Action:PlanterflexionFexion of knee
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PopliteusPopliteusOrigin:Groove below lat epicondyleInsertion:Back of tibia above soleal lineNS: med politeal n (tibial n)
Action:Unlocking of knee
Flexor digitorumlongus
Flexor hallucislongus
Tibialis posterior
Flexor digitorum longusFlexor digitorum longusOrigin:Post surface of tibia medial tovertical lineInsertion:Terminal phalanx of lateral 4 toesNS: posterior tibial n
Action:PlanterflexionInversionFlexion of all joints of lat 4 toesMaintain arches of foot
Flexor hallucis longusFlexor hallucis longusOrigin:Post surface of fibula lateral tomedial crestInsertion:Terminal phalanx of big toeNS: posterior tibial n
Action:PlanterflexionInversionFlexion of all joints of big toeMaintain arches of foot
Tibialis posteriorTibialis posteriorOrigin:Post surface of fibula medial tomedial crestInterosseus membranePost surface of tibial lateral tovertical lineInsertion:Tuberosity of navicular boneAll tarsal except talus2nd, 3rd, 4th, metatarsalsNS: posterior tibial n
Action:PlanterflexionInversionMaintain arches of foot
TibialTibial vesselsvessels
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Femoral artery
Popliteal artery
Anterior tibialartery
Posterior tibial artery
Dorsalis pedis artery
Ant
com
part
. of
leg
Post
com
part
. of
leg
Planter arteries
RetinaculaRetinacula
Superior extensor retinaculumInferior extensor retinaculum