Extensor Digitorum Brevis - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x 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 (2026) 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 Frequent questions What is the extensor digitorum brevis? The extensor digitorum brevis is a small intrinsic muscle located in the foot, situated beneath the long extensor tendons. Its primary role is to assist in the extension of the lateral four toes. What are the attachments of the extensor digitorum brevis? This muscle originates from the calcaneus and the inferior extensor retinaculum, and it inserts onto the long extensor tendons of toes 2 to 4. These attachments enable its functional role in toe extension. What is the function of the extensor digitorum brevis? The primary function of the extensor digitorum brevis is to extend the lateral four toes. This action is essential for maintaining balance and proper foot mechanics during movement. Which nerve innervates the extensor digitorum brevis? The extensor digitorum brevis is innervated by the deep fibular nerve. This nerve supply is crucial for the muscle's contraction and overall function. What is the blood supply to the extensor digitorum brevis? The blood supply for the extensor digitorum brevis comes from the fibular artery and the anterior tibial artery, specifically the dorsal pedis artery distally. Adequate blood flow is vital for the muscle's health and functionality. Rate This Article