MOINA Muscles of the Posterior Fascial Compartment of the Forearm

Question 1

extensor carpi radialis brevis

Answer 1

origin: lateral epicondyle of the humerus
insertion: posterior surface of base of third metacarpal bone

nerve: deep branch of radial nerve

extension and abduction of hand at wrist joint

Question 2

extensor digitorum

Answer 2

origin: lateral epicondyle of the humerus
insertion: middle and distal phalanges of medial four fingers

nerve: deep branch of median nerve

extends fingers and hand

Question 3

extensor digiti minimi

Answer 3

origin: lateral epicondyle of the humerus
insertion: extensor expansion of the little fingers

nerve: deep branch of radial nerve

extends metacarpal phalangeal joint of little finger

Question 4

extensor carpi ulnaris

Answer 4

origin: lateral epicondyle of the humerus
insertion: base of fifth metacarpal bone

nerve: deep branch of radial nerve

adducts and extends hand at wrist joint

Question 5

anconeus

Answer 5

origin: lateral epicondyle of humerus
insertion: lateral surface of olecranon process of ulna

nerve: deep branch of radial nerve

extends elbow joint