Thumb extensors

Question 1

name the thumb extensors

Answer 1

Extensor Pollicis Longus and Brevis

Question 2

Extensor Pollicis Longus origin

Answer 2

middle 1/3 of post. surface of ulna & interosseous membrane

Question 3

Extensor Pollicis Longus insertion

Answer 3

dorsal surface of distal phalanx of thumb

Question 4

Extensor Pollicis Longus nerve supply

Answer 4

post. interosseous branch of radial nerve C7, 8

Question 5

Extensor Pollicis Longus action

Answer 5

ext. and radial deviation of the wrist
ext. of all thumb joints

Question 6

Extensor Pollicis Longus function

Answer 6

catching a ball

Question 7

Extensor Pollicis Brevis origin

Answer 7

mid part of post. surface of radius & interosseous membrane

Question 8

Extensor Pollicis Brevis insertion

Answer 8

dorsal surface of base of proximal phalanx of thumb

Question 9

Extensor Pollicis Brevis nerve supply

Answer 9

post. interosseous branch of radial nerve C7, 8

Question 10

Extensor Pollicis Brevis action

Answer 10

ext & radial deviation of wrist
ext of carpometacarpal & mcp joint of thumb

Question 11

Extensor Pollicis Brevis function

Answer 11

catching a ball