Extensor Digitorum - Podcast Version TeachMeAnatomy 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The extensor digitorum is a muscle within the superficial compartment of the posterior forearm. The tendons of the extensor digitorum pass through the 4th extensor compartment at the wrist. Attachments: Originates from the lateral epicondyle of the humerus. The tendon divides into four in the distal forearm, and inserts into the extensor hood of each digit. Actions: Extension of the digits at the interphalangeal and metacarpophalangeal joints. Innervation: Radial nerve (deep branch). Blood supply: Radial artery By TeachMeSeries Ltd (2026) Fig 1The muscles in the superficial layer of the posterior forearm. 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 Pro Feature - Dissection Atlas Prosection of the superficial layer of muscles within the posterior compartment of the forearm. Prosection of the superficial layer of muscles within the posterior compartment of the forearm. You've Discovered a Pro Feature Access our Dissection Image Library Enhance your understanding with high-resolution dissection images showcasing real-life anatomy. Learn More Rate This Article