Posterior Forearm (deep) Extensors Flashcards
1
Q
Abductor Pollicis Longus
A
O: posterior surface middle ulna, radius, and interosseous membrane
I: base of 1st metacarpal
A: abduct thumb
N: posterior interosseous
2
Q
Extensor Pollicis Brevis
A
O: middle 1/3 posterior surface radius and interosseous membrane
I: base of proximal phalanx of thumb
A: extend thumb
N: posterior interosseous
3
Q
Extensor Pollicis Longus
A
O: middle 1/3 posterior surface of ulna and interosseous membrane
I: base of distal phalanx of thumb
A: extend thumb
N: posterior interosseous
4
Q
Extensor Indicis
A
O: posterior surface of ulna and interosseous membrane
I: extensor digitorum tendon to index finger
A: extend index finger
N: posterior interosseous
