10-1-09 handout

10-1-09 handout - Muscles of the Leg and Ankle Anterior...

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Muscles of the Leg and Ankle Anterior Anterior location is also called anterior compartment Supplied by deep fibular nerve o Tibialis anterior o Extensor hallucis longus o Extensor digitorum longus o Fibularis tertius Muscles of the Leg and Ankle – Anterior Tibialis Anterior See other card More comment: The tibialis anterior, extensor hallucis longus and extensor digitorum longus are included in the anterior compartment Muscles of the Leg and Ankle – Anterior Extensor hallucis longus O: - anterior medial shaft of the fibula I: base of the distal phalanx of the great toe N: deep fibular A: Ankle dorsiflexion and inversion Great toe – MTP, IP extension (metatarsal phalangeal and inter phalangeal) Hallucis – big toe R: (resist) – great toe extension Muscles of the Leg and Ankle – Anterior Extensor digitorum longus O: - lateral condyle of the tibia and proximal ¾ shaft of the fibula I: 4 lesser toes N: deep fibular A: Ankle – dorsiflexion and eversion (because it’s more lateral than extensor hallucis longus) 4 lateral toes – MTP, PIP, and DIP extension
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C: Extensor digitorum longus lies lateral to the midline of the ankle so it produces eversion; flexor digitorum longus lies lies behind the medial malleolus medial to the posterior ankle so it produces inversion
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Muscles of the Leg and Ankle – Anterior Fibularis tertius N: deep fibular A: ankle dorsiflexion and eversion Used to be called Peroneus tertius Muscles of the Leg and Ankle – Posterior Gastrocnemius Plantaris Soleus Same info as before N: tibial Muscles of the Leg and Ankle – Behind the lateral malleolus Fibularis longus Fibularis brevis Felicia and Frances O: lateral fibula - longus is proximal 2/3; brevis is distal 2/3 I: longus – 1
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10-1-09 handout - Muscles of the Leg and Ankle Anterior...

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