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Anatomy of the Leg
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Anatomy of the Leg

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  • 1. 4/12/2012 The leg Dr. Rania Sherif Lecturer of Anatomy, Mansoura university Dorsiflexion Planter flexion Inversion Eversion Extension Flexion Sciatic Nerve Sciatic nerve Medial popliteal n Lateral popliteal n Or Or Tibial n Common peroneal n Deep peroneal n Superficial peroneal nPosterior tibial n Or Or Flexion Extension Anterior tibial n Musculcutaneous n 1
  • 2. 4/12/2012 Deep peroneal n Dorsiflexion of foot (extension) Inversion except 1 (subtalar joint) Ant 4 Superficial peroneal n Extensor Anterior Group Planter-flexion Eversion Post 7 Med Lat Flexor Tibial n (4) Posterior tibial n (4) Planter-flexion of foot (flexion) Inversion 3 fibula (ant 1 tibia (lat surface) surface) Tibialis anterior Extensor digitorum longus (3/4) Tibialis anterior Extensor Extensor hallucis longus digitorum (2/4) longusPeroneus tertius (1/4) Extensor hallucis longus Peroneus tertiusExtensor digitorum longus Tibialis anteriorOrigin: Origin:Ant surface of fibula (upper ¾) Lat surface of tibia (upper ½ )Insertion: Insertion:Divide into 4 tendons Medial cuneiform boneBases of Middle & distal phalanx Base of 1st metatarsal boneof lateral 4 toes (extensorexpansion) NS: deep peroneal nNS: deep peroneal nAction: Action:Dorsiflexion of foot DorsiflexionInversion of foot InversionExtension to all joints of lateral 4toes 2
  • 3. 4/12/2012Peroneus tertius Extensor hallucis longus Origin: Origin: Ant surface of fibula (lower ¼ ) Ant surface of fibula (middle Insertion: 2/4) Dorsal surface of base of 5th Insertion: metatarsal Base of Distal phalanx of big NS: deep peroneal n toe Action: NS: deep peroneal n Dorsiflexion of foot Action: Eversion of foot Dorsiflexion of foot Inversion of foot Extension to all joints of big toe Peroneus longus Peroneus Lateral Group brevisPeroneus brevis Peroneus longus Origin: Origin: Lat surface of fibula (upper Lat surface of fibula (lower 2/3) 2/3) Insertion: Lat surface of head of fibula Base of 5th metatarsal bone NS: superficial peroneal n Pass in groove on undersurface Action: of cuboid bone Planter-flexion of foot Insertion: Eversion of foot Medial cuneiform bone Base of 1st metatarsal bone NS: superficial peroneal n Action: Planter-flexion of foot Eversion of foot Mentain arches of the foot 3
  • 4. 4/12/2012 Gastrocnemius Plantaris Posterior Group Tendocalcaneus Achilles TendonGastrocnemius PopliteusOrigin:Medial head:popliteal surface abovemedial condyleLateral head: above lateral epicondyleInsertion: FlexorTendocalcaneus digitorum TibialisMiddle of post surface of calcaneus longus posteriorNS: medial popliteal n (tibial n)Action:PlanterflexionFlexion of knee jointPlantaris Soleus Origin:Origin: Back of Head of fibulaPopliteal surface above lateral Posterior surface of fibulacondyle Tendenous archInsertion: Soleal lineTendocalcaneus Medial border of tibiaOr Middle of post surface of Insertion:calcaneus Tendocalcaneus Middle of post surface of calcaneusNS: medial popliteal n (tibial n) NS: (tibial) + post tibial n Action:Action: PlanterflexionPlanterflexion Propelling force in walkingFexion of knee Steady leg on ground Help venous return from LL 4
  • 5. 4/12/2012 Popliteus Origin: Groove below lat epicondyle Insertion: Back of tibia above soleal line Flexor digitorum Flexor hallucis NS: med politeal n (tibial n) longus longus Action: Unlocking of knee Tibialis posteriorFlexor hallucis longus Flexor digitorum longusOrigin: Origin:Post surface of fibula lateral to Post surface of tibia medial tomedial crest vertical lineInsertion: Insertion:Terminal phalanx of big toe Terminal phalanx of lateral 4 toesNS: posterior tibial n NS: posterior tibial nAction: Action:Planterflexion PlanterflexionInversion InversionFlexion of all joints of big toe Flexion of all joints of lat 4 toesMaintain arches of foot Maintain arches of foot Tibialis posterior Origin: Post surface of fibula medial to medial crest Interosseus membrane Post surface of tibial lateral to Tibial vessels vertical line Insertion: Tuberosity of navicular bone All tarsal except talus 2nd, 3rd, 4th, metatarsals NS: posterior tibial n Action: Planterflexion Inversion Maintain arches of foot 5
  • 6. 4/12/2012 Femoral artery Popliteal artery Retinacula Anterior tibial Posterior tibial artery artery Post compart. of leg Ant compart. of leg Dorsalis pedis artery Planter arteries Superior extensor retinaculumSuperior peroneal retinaculum Inferior extensor retinaculumInferior peroneal retinaculum Tom Tibialis anterior Has Extensor Hallucis LongusPeroneus longus & brevis ms Very Anterior tibial vessles Nice Anterior Tibial nerve Dog Extensor digitorum longus & Peroneus Terieus Pig Flexor Retinaculum Tom Tibialis posterior Does Flexor Digitorum Longus Very Posterior tibial vessles Nice Posterior Tibial nerve Flexor Hallucis longus Homework 6