Flexor Digitorum Longus - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The flexor digitorum longus is a muscle within the deep compartment of the posterior leg. It is a thin muscle, located medially within the compartment. Attachments: Originates from the medial surface of the tibia and attaches to the plantar surfaces of the lateral four digits. Actions: Flexion of the lateral four toes. Innervation: Tibial nerve Blood supply: Posterior tibial artery By TeachMeSeries Ltd (2026) Fig 1Muscles in the deep layer of the posterior 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 Pro Feature - Dissection Atlas Prosection of the posterior leg with the proximal aspect of the gastrocnemius removed the demonstrate the underlying structures. Prosection of the posterior leg with the proximal aspect of the gastrocnemius removed the demonstrate the underlying structures. 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 Frequent questions What is the flexor digitorum longus muscle? The flexor digitorum longus is a thin muscle found in the deep compartment of the posterior leg, primarily responsible for toe movement. Where does the flexor digitorum longus originate and insert? This muscle originates from the medial surface of the tibia and inserts on the plantar surfaces of the lateral four toes. What actions does the flexor digitorum longus perform? The main action of the flexor digitorum longus is the flexion of the lateral four toes, facilitating gripping and balance during movement. Which nerve supplies the flexor digitorum longus muscle? The flexor digitorum longus is innervated by the tibial nerve, which is crucial for its motor function. What is the blood supply for the flexor digitorum longus? The blood supply to the flexor digitorum longus muscle is provided by the posterior tibial artery, ensuring it receives the necessary nutrients for function. Rate This Article