Muscles of the Posterior Fascial Compartment of the Forearm Flashcards
1
Q
Extensor carpi radialis brevis
A
O - Lateral epicondyle of humerus
I - Posterior surface of base of third metacarpal bone
N - Deep branch of radial nerve
N - C7, 8
A - Extends and abducts hand at wrist joint
2
Q
Extensor digitorum
A
O - Lateral epicondyle of humerus I - Middle and distal phalanges of medial four fingers N - Deep branch of radial nerve N - C7, 8 A - Extends fingers and hand
3
Q
Extensor digiti minimi
A
O - Lateral epicondyle of humerus I - Extensor expansion of little finger N - Deep branch of radial nerve N - C7, 8 A - Extends metacarpal phalangeal joint of little finger
4
Q
Extensor carpi ulnaris
A
O - Lateral epicondyle of humerus I - Base of fifth metacarpal bone N - Deep branch of radial nerve N - C7, 8 A - Extends and adducts hand at wrist joint
5
Q
Anconeus
A
O - Lateral epicondyle of humerus I - Lateral surface of olecranon process of ulna N - Radial nerve N - C7, 8, T1 A - Extends elbow joint
6
Q
Supinator
A
O - Lateral epicondyle of humerus, annular ligament of proximal radioulnar joint, and ulna I - Neck and shaft of radius N - Deep branch of radial nerve N - C5, 6 A - Supination of forearm
7
Q
Abductor pollicis longus
A
O - Posterior surface of shafts of radius and ulna I - Base of first metacarpal bone N - Deep branch of radial nerve N - C7, 8 A - Abducts and extends thumb
8
Q
Extensor pollicis brevis
A
O - Posterior surface of shaft of radius I - Base of proximal phalanx of thumb N - Deep branch or radial nerve N - C7, 8 A - Extends metacarpophalangeal joints of thumb
9
Q
Extensor pollicis longus
A
O - Posterior surface of shaft of ulna I - Base of distal phalanx of thumb N - Deep branch of radial nerve N - C7, 8 A - Extends distal phalanx of thumb
10
Q
Extensor indicis
A
O - Posterior surface of shaft of ulna I - Extensor expansion of index finger N - Deep branch of radial nerve N - C7, 8 A - Extends metacarpophalangeal joint of index finger
