Extensor Digitorum Longus - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The extensor digitorum longus is a muscle in the anterior compartment of the leg. It is located lateral to the tibialis anterior, and its four tendons can be palpated on the dorsal surface of the foot. Attachments: Originates from the lateral condyle of the tibia and the medial surface of the fibula. The fibres converge into a tendon, which travels onto the dorsal surface of the foot. The tendon splits into four and each tendon inserts onto a toe, as shown in the image below. Actions: Extension of the lateral four toes and dorsiflexion of the foot Innervation: Deep fibular nerve Blood supply: Anterior tibial artery By TeachMeSeries Ltd (2026) Fig 1The muscles of the anterior leg. 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 longus muscle? The extensor digitorum longus is a muscle located in the anterior compartment of the leg, positioned laterally to the tibialis anterior. It is responsible for extending the lateral four toes and aiding in dorsiflexion of the foot. Where does the extensor digitorum longus originate? This muscle originates from the lateral condyle of the tibia and the medial surface of the fibula. Its anatomical position is crucial for its function in toe extension. How does the extensor digitorum longus insert into the toes? The muscle's tendon splits into four distinct tendons that insert onto the dorsal surface of each of the lateral four toes. This arrangement allows for effective extension during movement. What nerve innervates the extensor digitorum longus? The deep fibular nerve provides innervation to the extensor digitorum longus. This nerve is essential for the muscle's motor function and coordination. What is the blood supply for the extensor digitorum longus? The anterior tibial artery supplies blood to the extensor digitorum longus. This vascularisation is vital for the muscle's metabolic needs and overall function. Rate This Article