extensor hallucis longus


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extensor hallucis longus

a muscle that extends the great toe and dorsiflexes the foot at the ankle joint.

extensor hallucis longus

; EHL extrinsic foot muscle lying within anterior muscle compartment of lower leg
  • origin from middle 2/4 of medial surface of fibula, medial to extensor digitorum longus, tendon passes down lower leg lateral to anterior border of tibia but medial to tendon of extensor digitorum longus

  • insertion tendon passes into dorsum of foot deep to extensor and distal retinacula, lying at dorsomedial aspect of foot to form a dorsal expansion, the central part of which passes to distal phalanx of hallux; lateral part of dorsal expansion passes to deep transverse metatarsal ligament and the medial part of expansion joins tendon of abductor hallucis

  • nerve supply deep peroneal nerve

  • action extension of phalanges of hallux and dorsiflexion of ankle joint; acts as an auxiliary invertor of foot when hallux is extended at the first metatarsophalangeal joint

References in periodicals archive ?
Next, the anterior tibial artery is identified by palpating the area between the extensor hallucis longus tendon (which is evident on dorsiflexion of the first toe) and extensor digitorum longus muscle.
All the nerves/vessels can be approached with an in-plane needle-transducer orientation; however, the deep peroneal nerve is approached out-of-plane to facilitate needle passage lateral to the extensor hallucis longus tendon to reach the anterior tibial artery/deep peroneal nerve.
Left hip flexors were 2/5, knee extensors 2/5, ankle plantarflexion and dorsiflexion 3/5, and extensor hallucis longus 3/5.

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