Superficial posterior forearm

Question 1

Innervation of superior posterior forearm

Answer 1

Radial nerve

Question 2

Origin of brachioradialis

Answer 2

Proximal aspect of lateral supracondylar ridge of humerus

Question 3

Attachment of brachioradialis

Answer 3

Distal end of radius, just before radial styloid process

Question 4

Action of brachioradialis

Answer 4

Flexion of elbow

Question 5

Origin of extensor carpi radialis longus

Answer 5

Supracondylar ridge of humerus

Question 6

Origin of extensor carpi radialis brevis

Answer 6

Lateral epicondyle

Question 7

Attachment of extensor carpi radialis longus and brevis

Answer 7

Metacarpals 2 + 3

Question 8

Action of extensor carpi radialis longus and brevis

Answer 8

Extension and abduction of wrist

Question 9

Origin of extensor digitorum

Answer 9

Lateral epicondyle

Question 10

Attachment of extensor digitorum

Answer 10

Extensor hood of 4 fingers

Question 11

Action of extensor digitorum

Answer 11

Main extensor of 4 fingers at MCP and IP joints

Question 12

Origin of extensor carpi ulnaris

Answer 12

Lateral epicondyle

Question 13

Attachment of extensor carpi ulnaris

Answer 13

Base of metacarpal 5

Question 14

Action of extensor carpi ulnaris

Answer 14

Extension and adduction of wrist

Question 15

Origin of anconeus

Answer 15

Lateral epicondyle

Question 16

Attachment of anconeus

Answer 16

Posterior and lateral aspect of olecrannon

Question 17

Action of anconeus

Answer 17

Extension of elbow and moves ulna during pronation

Question 18

What is lateral epicondylitis

Answer 18

Inflammation of periosteum of lateral epicondyle caused by repeated use of superficial extensor muscles which strains their common tendinous attachment. Peak onset 40-50

Question 19

Muscles of superior posterior forearm

Answer 19

Brachioradialis,
Extensor carpi radialis longus and brevis,
Extensor digitorum,
Extensor carpi ulnaris,
Anconeus