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. By TeachMeSeries Ltd (2025) Fig 1The dorsal layer of foot muscles. Pro Feature - 3D Model You've Discovered a Pro Feature Access our 3D Model Library Explore, cut, dissect, annotate and manipulate our 3D models to visualise anatomy in a dynamic, interactive way. Learn More Print Article Rate This Article