Forearm extensor muscles

Question 1

Brachioradialis m. (superficial)

Answer 1

I: Lateral aspect digital radius
A: Flex + Supinate Forearm
N: Radial N.
Blood Supply: Radial recurrent a.

Question 2

Extensor carpal radialis longus m. (superficial)

Answer 2

I: Base 2nd metacarpal
A: Extend hand at wrist/ ABduct hand
N: Radial n.
Blood Supply: Radial a.

Question 3

Extensor carpal radialis brevis m. (superficial)

Answer 3

I: Base of 3rd metacarpal
A: Extend hand , ABduct hand
N: Radial n.
Blood supply: Radial a.

Question 4

Extensor digitorum m. (superficial)

Answer 4

I: Extensor expansion digits 2-5

A: Extend hand, metocarpalphalangeal joint, proximal and distal interphalangeal joints

N: Posterior interosseous n.

Blood Supply: Interosseous recurrent and posterior interosseous a.

Question 5

Extensor digit minimi m. (superficial)

Answer 5

I: Extensor expansion 5th digit

A: Extend 5th digit
N: Posterior interosseous n.

Blood Supply: Interosseous recurrent a.

Question 6

Extensor carpi ulnaris m. (superficial)

Answer 6

I: Base 5th metacarpal

A: Extend hand ADduct wrist

N: Posterior interosseous n.

Blood Supply: Interosseous recurrent a. ?

Question 7

Supinator m. (deep)

Answer 7

I: Proximal aspect of radial body

A: Supinate

N: Deep radial n.

Blood Supply: Recurrent interosseous a.

Question 8

Extensor Indicis m. (deep)

Answer 8

I: Extensor expansion 2nd digit

A: Extend hand @ wrist, EXTEND INDEX FINGER!

N: Posterior interosseous n.

Blood Supply: Posterior interosseous a.

Question 9

Abductor pollicis longus m.

Answer 9

I: Base of 1st metacarpal

A: ABduct hand at wrist, ABduct Pollex

N: Posterior interosseous n.

Blood Supply: Posterior interosseous a.

Question 10

Extensor pollicis brevis m.

Answer 10

I: Base of first proximal phalynx

A: Extends proximal phalynx of thumb

N: Posterior interosseous n.

Blood Supply: Posterior interosseous a.

Question 11

Extensor pollicis longus m.

Answer 11

I: Base of distal phalynx of thumb

A: Extend distal phalynx of thumb

N: Posterior interosseous n.

Blood Supply: Posterior interosseous a.