Deep extensors

Question 1

Origin and attachment of supinator

Answer 1

Origin: Superficial part- lateral epicondyle. Deep part- proximal lateral ulna
Attachment: lateral radius

Question 2

Nerve to supinator

Answer 2

posterior interosseous nerve C6,7

Question 3

Function of supinator

Answer 3

supination

Question 4

Origin and attachment of abductor pollicis longus

Answer 4

Origin: posterior ulna and radius around 1/2 way down and interosseous membrane
Attachment: base of 1st metacarpal

Question 5

Nerve to abductor pollicis brevis

Answer 5

posterior interosseous nerve C7,8

Question 6

Function of abductor pollicis longus

Answer 6

abduct thumb

Question 7

Origin and attachment of extensor pollicis brevis

Answer 7

Origin: posterior surface of radius, inferior to abductor pollicis longus and adjacent interosseous membrane
Attachment: base of 1st proximal phalanx

Question 8

Origin and attachment of extensor pollicis longus

Answer 8

Origin: posterior surface of ulna, inferior to abductor pollicis longus and adjacent interosseous membrane
Attachment: base of 1st distal phalanx

Question 9

Origin and attachment of extensor indices

Answer 9

Origin: posterior surface of ulna, inferior to extensor pollicis longus and adjacent interosseous membrane
Attachment: extensor hood of index finger

Question 10

Nerve to extensor pollicus longus & brevis

Answer 10

posterior interosseous nerve C7,8

Question 11

Nerve to extensor indices

Answer 11

posterior interosseous nerve C7,8

Question 12

Function of extensor pollicis brevis

Answer 12

extends thumb at metacarpophalangeal joint

Question 13

Function of extensor pollicis longus

Answer 13

extends thumb at interphalangeal joint

Question 14

Function of extensor indices

Answer 14

extends index finger