MuscleForearm — anterior (deep)
Flexor digitorum profundus
Latin: M. flexor digitorum profundus
Location: Forearm
View the flexor digitorum profundus in 3DOrigin
Anterior and medial surfaces of the ulna and interosseous membrane.
Insertion
Bases of the distal phalanges of the medial four fingers.
Action
The only flexor of the distal interphalangeal joints — the final curl of grip strength.
Nerve supply
Anterior interosseous nerve (median) to digits 2–3; ulnar nerve to digits 4–5.
Blood supply
Anterior interosseous and ulnar arteries.
Clinical relevance
Testing DIP flexion isolates it; jersey fingers avulse its tendon from the distal phalanx when gripping a tackling shirt.
Educational anatomy reference, not medical advice. About this content.