[TA] muscle of deep layer of anterior (flexor) compartment of forearm; origin, anterior surface of proximal third of ulna; insertion, by four tendons, piercing those of the flexor digitorum superficialis, into anterior aspect of the base of distal phalanx of each finger; action, flexes distal interphalangeal joint of fingers; nerve supply, ulnar and median (anterior interosseous muscle). SYN: musculus flexor digitorum profundus [TA], deep flexor (muscle) of fingers, musculus flexor profundus.
