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Flexor Pollicis Brevis
Region: Forearm & Hand Muscles · All forearm & hand muscles
Flexor Pollicis Brevis at a glance
| Origin | Flexor retinaculum and trapezium |
|---|---|
| Insertion | Lateral side of the base of the proximal phalanx of the thumb |
| Actions | Bends the thumb at the knuckle (MCP joint) |
| Nerve supply | Median nerve (recurrent branch) and ulnar nerve (deep branch) |
◆ Good to know
It has a sesamoid bone in each of its two heads near its insertion, visible on thumb X-rays.
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.