Posterior forearm

Question 1

Brachioradialis

Answer 1

1. Radial nerve
2. Supracondylar ridge of humerus
3. Distal end of radius

Question 2

Extensor Carpi Radialis Longus

Answer 2

1. Radial nerve
2. Supracondylar ridge of the humerus
3. Metacarpal bones 2 + 3

Question 3

Extensor Carpi Radialis Brevis

Answer 3

1. Radial nerve
2. Lateral epicondyle
3. Metacarpal bones 2 + 3

Question 4

Extensor digitorum

Answer 4

1. Deep branch of radial nerve
2. Lateral epicondyle
3. Splits into 4 and attaches to the extensor hood of each digit

Question 5

Extensor Digiti Minimi

Answer 5

1. Deep branch of Radial nerve
2. Lateral epicondyle
3. Extensor hood of little finger

Question 6

Extensor Carpi Ulnaris

Answer 6

1. Deep branch of Radial nerve
2. Lateral epicondyle
3. Base of metacarpal 5

Question 7

Anconeus

Answer 7

1. Radial nerve
2. Lateral epicondyle
3. Posterior and Lateral part of olecranon

Question 8

Supinator

Answer 8

1. Deep branch of Radial nerve
2. Lateral epicondyle and posterior surface of ulna
3. Posterior surface of radius

Question 9

Abductor Pollicis Longus

Answer 9

1. Posterior Interosseous branch of Radial nerve
2. Interosseous membrane
3. Lateral side of base of metacarpal 1

Question 10

Extensor Pollicis Brevis

Answer 10

1. Posterior Interosseous branch of Radial nerve
2. Posterior surface of radius
3. Base of proximal phalanx of thumb

Question 11

Extensor Pollicis Longus

Answer 11

1. Posterior interosseous branch of Radial nerve
2. Posterior surface of Ulna
3. Distal phalanx of the thumb

Question 12

Extensor Indicis Proprius

Answer 12

1. Posterior interosseous branch of Radial nerve
2. Posterior surface of ulna and interosseous membrane
3. Extensor hood of index finger