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Adductor Pollicis
Region: Forearm & Hand Muscles · All forearm & hand muscles
Adductor Pollicis at a glance
| Origin | Third metacarpal (oblique head) and the capitate and bases of the second and third metacarpals (transverse head) |
|---|---|
| Insertion | Medial side of the base of the proximal phalanx of the thumb |
| Actions | Pulls the thumb in toward the palm (adduction); Powers pinch grip |
| Nerve supply | Ulnar nerve, deep branch (C8–T1) |
◆ Good to know
Froment's sign tests it: with ulnar nerve palsy the patient bends the thumb tip (using flexor pollicis longus) instead of adducting when gripping paper.
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.