Flexor digitorum profundus
Musculus flexor digitorum profundus
MuscularDeep musclesArmLeft and right
View left in 3D View right in 3D
- What it is
- Deep flexor from the upper anterior and medial ulna and the interosseous membrane; its four tendons run through the carpal tunnel beneath and then through the split superficialis tendons to the distal phalanges.
- Function
- The only muscle that bends the fingertips (distal interphalangeal joints); also flexes the other finger joints and the wrist.
- Size
- About 25 cm to the palm.
- Clinical note
- "Jersey finger" is avulsion of its ring-finger tendon when grabbing a shirt. The tendons are shown only as far as the knuckles.