The extensor hallucis brevis is an intrinsic muscle of the foot. It is often considered to be the medial part of the extensor digitorum brevis muscle, rather than a separate structure.
- Attachments: Originates from the calcaneus and inferior extensor retinaculum. It attaches to the base of the proximal phalanx of the great toe.
- Actions: Extension of the great toe.
- Innervation: Deep fibular nerve.
- Blood Supply: Dorsalis pedis artery.