Extensor hallucis brevis muscle
| Extensor hallucis brevis muscle |
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Dorsal foot muscles:
The extensor hallucis brevis muscle is combined with the extensor digitorum brevis muscle on the label on this figure . |
| origin |
| Dorsal surface of the calcaneus |
| approach |
| Head of the base of the big toe |
| function |
| Extension of the big toe |
| Innervation |
| Deep peroneal nerve |
| Spinal segments |
| L5, S1 |
The extensor hallucis brevis muscle ( Latin for "short big toe extensor ") arises from the dorsal (upper) surface of the heel bone (calcaneus) near the sinus tarsi . It starts at the head of the base of the big toe.
The muscle stretches the big toe in the metatarsophalangeal joint of the big toe.
The muscle can be viewed as the medial part of the extensor digitorum brevis muscle . Whether the two can be distinguished at all is controversial.
The muscle is innervated by the deep fibular nerve.