Posteriolateral compartment of antebrachium

Question 1

Brachioradialis

Answer 1

Supraepicondylar ridge humerus
Styloid process radius
Elbow flexion
Radial nerve

Question 2

Extensor carpi radialis longus

Answer 2

Radial nerve
Lateral epicondyle of humerus
base of 2nd metacarpal
wrist extension and abduction

Question 3

Extensor carpi radialis brevis

Answer 3

Radial nerve
Lateral epicondyle of humerus
base of 3rd metacarpal
wrist extension and abduction

Question 4

Extensor digitorum

Answer 4

Radial nerve					
Lateral epicondyle of humerus								
Digits 2-5	
Metacaropophalangeal, interphalanges	
finger extension

Question 5

Extensor digiti minimi

Answer 5

Radial nerve
Lateral epicondyle of humerus
Prox phalanx 5th finger metacaropophalangeal 5th finger extension

Question 6

Extensor carpi ulnarus

Answer 6

Radial nerve
Lateral epicondyle of humerus
base of 5th metacarpal
wrist extension and adduction

Question 7

Supinator

Answer 7

Radial nerve
Lateral epicondyle of humerus & ulna proximal radius Elbow
Forearm supination

Question 8

Abductor pollicis longus

Answer 8

Radial nerve
radius and ulnar
1st metacarpal metacaropophalangeal abduction thumb

Question 9

extensor pollicis brevis

Answer 9

Radial nerve					
radius	
Proximal phalanx thumb	
metacaropophalangeal
1st metacarpal extension

Question 10

Extensor pollicis longus

Answer 10

Radial nerve
ulnar
Distal phalanx thumb Interphalangeal
1st IP jt E

Question 11

Extensor indicis

Answer 11

Radial nerve
ulnar
Extensor digitorum tendon Metacaropophalangeal, interphalanges
2nd MCP, PIP & DIP E