extensor pollicis brevis Flashcards
(4 cards)
1
Q
extensor pollicis brevis origin
A
middle 1/3 posterior surface of radius & adjacent interosseous membrane
2
Q
extensor pollicis brevis insertion
A
dorsal surface, base of proximal phalanx of thumb
3
Q
extensor pollicis brevis nerve supply
A
radial nerve C7, 8
4
Q
extensor pollicis brevis action
A
extends CMC, MCP of thumb, extends and abducts wrist
