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image: Extensor Digitorum Longus
Extensor Digitorum Longus

Extensor Digitorum Longus

 Articulations :

 Action :

  • Extend toes 2 − 5 and dorsiflexes ankle.

Origin :

  • Lateral condyle of fibula.
  • Upper 2/3 − 3/4 of medial fibular shaft surface.
  • Upper part of interosseous membrane, fascia cruris and anterior intermuscular septum.

Insertion :

  • Splits into 4 tendon slips after inferior extensor retinaculum,
  • each of which insert on dorsum of middle and distal phalanges as part of extensor expansion complex.

Innervation :

  • Deep peroneal nerve (L4, L5, S1)

Arterial Supply :

  • Anterior tibial artery.

Depth :

  • Superficial
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