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Flexor Digitorum Profundus
Region: Forearm & Hand Muscles · All forearm & hand muscles
Flexor Digitorum Profundus at a glance
| Origin | Front and medial surfaces of the ulna and the interosseous membrane |
|---|---|
| Insertion | Bases of the distal phalanges of the four fingers |
| Actions | Bends the fingertips (DIP joints) — the only muscle that does; Helps bend the other finger joints and the wrist |
| Nerve supply | Median nerve (index and middle) and ulnar nerve (ring and little), C8–T1 |
◆ Good to know
The fingertip flexor: testing it (bend the fingertip while holding the middle joint still) checks the tendon and both its nerves after hand injuries.
More Forearm & Hand Muscles
Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.