The extensor digitorum brevis is an intrinsic muscle of the foot. It is a small, thin muscle which lies underneath the long extensor tendons of the foot. Attachments: Originates from the calcaneus and inferior extensor retinaculum. It attaches onto the long extensor tendons of toes 2-4. Actions: Extension of the lateral four toes. Innervation: Deep fibular nerve. Blood Supply: Fibular artery and anterior tibial artery (dorsal pedis artery distally). By TeachMeSeries Ltd (2025) Fig 1.0The 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