Flexor Digitorum Profundus - Podcast Version 0:00 / 0:00 1x 0.25x 0.5x 0.75x 1x 1.25x 1.5x 1.75x 2x The flexor digitorum profundus is a muscle within the deep compartment of the anterior forearm. Attachments: Originates from the ulna and associated interosseous membrane. At the wrist, it splits into four tendons. These pass through the carpal tunnel and attach to the base of the distal phalanx of the each digit. Actions: Flexion at the distal interphalangeal joint of the digits. It also performs flexion at the wrist, metacarpophalangeal and proximal interphalangeal joints. Innervation: The medial half of the muscle (acts on the little and ring fingers) is innervated by the ulnar nerve. The lateral half (acts on the middle and index fingers) is innervated by the anterior interosseous branch of the median nerve. Blood supply: Ulnar artery By TeachMeSeries Ltd (2026) Fig 1Deep flexor muscles of the anterior 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 deep compartment of the anterior forearm, with the superficial muscles divided and reflected. Prosection of the deep compartment of the anterior forearm, with the superficial muscles divided and reflected. 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 profundus? The flexor digitorum profundus is a muscle located in the deep compartment of the anterior forearm. It plays a crucial role in flexing the fingers and wrist. What are the attachments of the flexor digitorum profundus? This muscle originates from the ulna and the interosseous membrane, and it divides into four tendons at the wrist that attach to the bases of the distal phalanges of each finger. What actions does the flexor digitorum profundus perform? The flexor digitorum profundus facilitates flexion at the distal interphalangeal joints of the fingers, as well as at the wrist, metacarpophalangeal, and proximal interphalangeal joints. How is the flexor digitorum profundus innervated? The muscle is innervated by two nerves: the ulnar nerve supplies the medial half, which controls the little and ring fingers, while the anterior interosseous branch of the median nerve innervates the lateral half, affecting the middle and index fingers. What is the blood supply for the flexor digitorum profundus? The primary blood supply to the flexor digitorum profundus comes from the ulnar artery, ensuring it receives adequate oxygen and nutrients for its function. Rate This Article