Deep muscles of the forearm

Question 1

What are the deep muscles of the posterior forearm?

Answer 1

Abductor pollicis longus 
Extensor pollicis brevis 
extensor pollicis longus 
extensor indicis 
supinator

Question 2

What are the attachments of Abductor pollicis longus?

Answer 2

radius, interosseous membrane, ulna to base of first metacarpal

Question 3

What is the action of abductor pollicis longus?

Answer 3

abduction of thumb

Question 4

What are the attachments of extensor pollicis brevis?

Answer 4

radius and interosseous membrane to base o proximal phalanx of thumb

Question 5

what is the action of extensor pollicis brevis?

Answer 5

assist in extension of thumb

Question 6

What are the attachments Extensor pollicis longus?

Answer 6

interosseus membrane, part of the ulna, tendon proceeding around dorsal radial tubercle to base of distal phalanx of thumb.

Question 7

What is the action of Extensor pollicis longus?

Answer 7

assist in extension of thumb

Question 8

What are the attachments of Extensor indices M?

Answer 8

interosseus membrane and ulna in distal forearm to common extensor tendon in 2nd digit

Question 9

What is the action of Extensor indices M?

Answer 9

separate extension of index finger

Question 10

What are the attachments of Supinator M?

Answer 10

small origin of ulna wraps around radius to proximal radius

Question 11

What is the action of supinator?

Answer 11

supinates forearm from pronation position always active in supination

Question 12

What are the anterior borders of the snuff box?

Answer 12

• tendons of of abductor pollicis longus and extensor pollicis brevis

Question 13

what is the posterior border of the snuff box?

Answer 13

tendon of extensor pollicis longus

Question 14

What courses superficial to the snuff box?

Answer 14

radial N

Question 15

What is deep inside the snuff box?

Answer 15

radial artery before it goes to the dorsal hand

Question 16

What bone is included in the deep surface of the snuff box?

Answer 16

scaphoid bone