Updated: 10/19/2017

Extensor digitorum longus (L5)

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Origin Lateral tibial condyle, proximal 3/4 of anterior fibula, 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
Action Extend toes 2 - 5 and dorsiflexes ankle
Innervation Deep peroneal nerve (L4, L5, S1) (L4, L5, S1) q
Arterial Supply Anterior tibial artery





 

 

 

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Questions (1)

(OBQ04.53) Injury to the deep peroneal nerve would result in which of the following? Tested Concept

QID: 1383
1

Weakness of hindfoot eversion

7%

(265/3762)

2

Weakness of hindfoot inversion

2%

(63/3762)

3

Weakness of great toe extension

85%

(3204/3762)

4

Weakness of great toe flexion

3%

(114/3762)

5

Weakness of ankle plantarflexion

2%

(88/3762)

L 1 C

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