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

4/12/2012

2

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 digitorum longusExtensor digitorum longus

4/12/2012

3

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

4/12/2012

4

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

4/12/2012

5

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

4/12/2012

6

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

Tibialis anteriorExtensor Hallucis LongusAnterior tibial vesslesAnterior Tibial nerveExtensor digitorum longusPeroneus Terieus

TomHasVeryNiceDog

&Pig

Superior peroneal retinaculum

Inferior peroneal retinaculum

Peroneus longus & brevis ms

Tibialis posteriorFlexor Digitorum LongusPosterior tibial vesslesPosterior Tibial nerveFlexor Hallucis longus

Flexor Flexor RetinaculumRetinaculum

TomDoesVeryNice

Homework