PosteriorForearm Muscles - Fxn&Innervation

Question 1

Fxn and Innervation of Brachioradialis

Answer 1

Fxn: Flexes forearm at the elbow when partially pronated

Nerve: Radial nerve

Question 2

Fxn and Innervation: Extensor carpi radialis longus

Answer 2

Fxn: Extend and abduct hand at wrist

Nerve: Radial Nerve

Inserts Dorsal side of proximal metacarpal 2

Question 3

Fxn and Innervation: Extensor carpi radialis brevis

Answer 3

Fxn: Extend and abduct hand at wrist

Nerve: Posterior Interosseous Nerve

Dorsal side of proximal metacarpal 3

Question 4

Fxn and Innervation: Extensor Digitorum

Answer 4

Fxn: Extends digits 2-5

Nerve: Posterior Interosseous Nerve

Question 5

Fxn and Innervation: Extensor Digiti Minimis

Answer 5

Fxn: Extends 5th digit at MP

Nerve: Posterior interosseous nerve

Question 6

Fxn and Innervation: Extensor carpi ulnaris

Answer 6

Fxn: Extends and adducts hand at wrist

Nerve: Posterior interosseous nerve

Question 7

Fxn and Innervation: Supinator

Answer 7

Fxn: Supinates forearm at elbow

Nerve: Deep branch of the radial nerve

Question 8

Fxn and Innervation: Extensor Indicis

Answer 8

Fxn: Extends digit 2

Nerve: Posterior interosseous nerve

Question 9

Posterior Compartment 1

Answer 9

Brachioradialis
Extensor Carpi Radialis Longus
Extensor Carpi Radialis Brevis
Extensor Digitorum
Extensor Digiti Minimi
Extensor Carpi Ulnaris

Question 10

Posterior Compartment 2

Answer 10

Supinator