extensor digitorum brevis muscle
The extensor digitorum brevis muscle is a muscle on the dorsal surface of the foot which helps extend digits 2 through 4.
Summary
- origin: superolateral surface of calcaneus
- insertion: lateral sides of the tendons of extensor digitorum longus of toes II to IV
- action: extension of toes II to IV
- arterial supply: dorsalis pedis artery
- innervation: deep peroneal nerve
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