Posterior Forarm Muscle Attachments

Question 1

What are the Brachioradialis attachments

Answer 1

Supracondyler ridge of humerus and adjacent intermuscular septum

Lateral surface of distal end of radius

Question 2

What are the Extensor Carpi Radialis Longus attachments

Answer 2

Lateral supracondylar ridge on humerus

Dorsal surface of base of metacarpal 2

Question 3

What are the Extensor Carpi Radialis Brevis attachments

Answer 3

Lateral epicondyle of humerus

Dorsal surface of base of metacarpal 2+3

Question 4

What are the Extensor Carpi Ulnaris attachments

Answer 4

Lateral epicondyle of the humerus

Tubercle medial side of base of metacarpal 5

Question 5

What are the Extenor Digitorum attachments

Answer 5

Lateral epicondyle of humerus

Base of middle and distal phalanges of each finger (Dorsal digit expansion)

Question 6

What are the Extensor Digiti Minimi attachments

Answer 6

Lateral epicondyle of the humerus

Dorsal digital expansion of digit 5

Question 7

What are the Supinator attachments (DEEP P)

Answer 7

Superficial layer: lateral epicondyle of humeru, collateral and angular ligaments
Deep layer: Supinator crest of the ulna

Lateral surface of radius, superior to the anterior oblique line

Question 8

What are the Abductor Pollicis Longus attachments

Answer 8

Posterior surface of upper ulnar and middle radius, intervening interosseus membrane

Radial side of base of metacarpal 1

Question 9

What are the Extensor Pollicis Longus attachments

Answer 9

Posterior surface of middle 1/3 of ulnar and interosseus membrane

Dorsal surface of base of distal phalanx of thumb

Question 10

What are the Extensor Pollicis Brevis attachments

Answer 10

Posterior surface of middle of ulna an interosseus membrane

Dorsal surface of base of proximal phalanx of thumb

Question 11

What are the Extensor Indicis attachments

Answer 11

Posterior surface of the distal ulna and interosseus membrane

Dorsal digital expansion of index finger