Posterior Forearm And Hand

Question 1

What are the extensor/posterior superficial deep muscles of the forearm

Answer 1

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

Question 2

What are the deep layers of the extensor/posterior compartment of the forearm?

Answer 2

Supinator
Abductor Pollicis Longus
Extensor Pollicis Longus
Extensor Pollicis Brevis
Extensor Indicis

Question 3

Where do most muscles arise from?

Answer 3

Lateral epicondyle of the humerus

Question 4

Function & innervation: brachioradialis

Answer 4

Forearm flexion & radial nerve

Question 5

Function & innervation: extensor carpi radialis longus

Answer 5

Extension/abduction of hand & radial nerve

Question 6

Function & innervation: extensor carpi radialis Brevis

Answer 6

Extension/abduction of hand & radial nerve

Question 7

Function & innervation: extensor carpi radialis Brevis

Answer 7

Extension/abduction of hand & radial nerve

Question 8

Function & innervation: Extensor digitorum

Answer 8

Extension of fingers/hand & radial nerve

Question 9

Function & innervation: Extensor carpi ulnaris

Answer 9

Extension/adduction of hand & radial nerve

Question 10

Function & innervation: Extensor digiti minimi

Answer 10

Extension of 5th digit & radial nerve

Question 11

Function & innervation: supinator

Answer 11

Forearm supination & radial nerve

Question 12

Function & innervation: abductor pollicis longus

Answer 12

Abduction/extinction of thumb & radial nerve

Question 13

Function & innervation: extensor pollicis longus

Answer 13

Extension of 1st digit at IP + MCP joint & radial nerve

Question 14

Function & innervation: extensor pollicis Brevis

Answer 14

Extension of 1st digit at MCP joint & radial nerve

Question 15

Function & innervation: Extensor indicis extension

Answer 15

Extension of 2nd digit (index) & radial nerve

Question 16

What does the brachial artery branch into?

Answer 16

Radial artery and ulnar artery

Question 17

What does the ulnar artery branch into?

Answer 17

Interousseous artery (has anterior and posterior divisions)

Question 18

What are the nerves of the forearm?

Answer 18

Median, ulnar, and radial

Question 19

What does the median nerve innervate?

Answer 19

Muscles of anterior compartment of forearm EXCEPT: flexor carpi ulnaris and digits of 4-5 for flexor digitorum profundus

Question 20

What does the ulnar nerve innervate?

Answer 20

Flexor carpi ulnaris and digits 4-5 for flexor digitorum profundus

Question 21

What does the radial nerve innervate?

Answer 21

Deep branch innervate all muscles of extensor compartment of forearm

Superficial branch innervate skin on posterior of 1st digit