Posterior Forearm

Question 1

Muscles that extend and abduct or adduct the hand at the wrist joint:

Answer 1

• extensor carpi radialis longus
• extensor carpi radialis brevis
• extensor carpi ulnaris

Question 2

what is the action of extensor carpi radialis longus and brevis on the wrist joint?

Answer 2

• extension and abduction (radial deviation) at the wrist joint

Question 3

which muscles of the posterior forearm extend the medial four digits?

Answer 3

• extensor digitorum
• extensor indicis
• extensor digiti minimi

Question 4

Answer 4

Question 5

which muscles of the posterior forearm extend or abduct the thumb?

Answer 5

• abductor pollicis longus (APL)
• extensor pollicis brevis (EPB)
• extensor pollicis longus (EPL)

Question 6

which muscle envelops the neck and the proximal part of the shaft of the radius, covering it completely, except on its medial side?

Answer 6

supinator

Question 7

what is the action of the extensor digitorum?

Answer 7

extend medial 4 digits at MCP joints

Question 8

what is the action of the extensor carpi radialis longus

Answer 8

extension and radial deviation at wrist joint

Question 9

what is the action of extensor carpi radialis brevis?

Answer 9

extension and radial deviation at wrist joint

Question 10

what ios the action of the extensor carpi ulnaris?

Answer 10

extension and ulnar deviation at wrist joint