Muscles of the Posterior Fascial Compartment of the Forearm : OINA Flashcards
Extensor carpi radialis brevis: Origin
Lateral epicondyle of humerus
Extensor carpi radialis brevis: Insertion
Posterior surface of base of 3rd metacarpal bone
Extensor carpi radialis brevis: Innervaton
Deep branch of radial nerve; C7-8
Extensor carpi radialis brevis: Action
Extends and abducts hand at wrist joint
Extensor digitorum: Origin
Lateral epicondyle of humerus
Extensor digitorum: Insertion
Middle and distal phalanges of medial four fingers
Extensor digitorum: Innervation
Deep branch of radial nerve; C7-8
Extensor digitorum: Action
Extends fingers and hand
Extensor digiti minimi: Origin
Lateral epicondyle of humerus
Extensor digiti minimi: Insertion
Extensor expansion of little finger
Extensor digiti minimi: Innervation
Deep branch of radial nerve; C7-8
Extensor digiti minimi: Action
Extends metacarpal phalangeal joint of little finger
Extensor carpi ulnaris: Origin
Lateral epicondyle of humerus
Extensor carpi ulnaris: Insertion
Base of 5th metacarpal bone
Extensor carpi ulnaris: Innervation
Deep branch of radial nerve; C7-8
Extensor carpi ulnaris: Action
Extends and adducts hand at wrist joint
Anconeus: Origin
Lateral epicondyle of humerus
Anconeus: Insertion
Lateral surface of olecranon process of ulna
Anconeus: Innervation
Radial nerve; C7-8, T1
Anconeus: Action
Extends elbow joint
Supinator: Origin
Lateral epicondyle of humerus, anular ligament of proximal radioulnar joint, and ulna
Supinator: Insertion
Neck and shaft of radius
Supinator: Innervation
Deep branch of radial nerve; C5-6
Supinator: Action
Supination of forearm
Abductor pollicis longus: Origin
Posterior surface of shafts of radius and ulna
Abductor pollicis longus: Insertion
Base of 1st metacarpal bone
Abductor pollicis longus: Innervation
Deep branch of radial nerve; C7-8
Abductor pollicis longus: Action
Abducts and extends thumb
Extensor pollicis brevis: Origin
Posterior surface of shaft of radius
Extensor pollicis brevis: Insertion
Base of proximal phalanx of thumb
Extensor pollicis brevis: Innervation
Deep branch of radial nerve; C7-8
Extensor pollicis brevis: Action
Extends metacarpophalangeal joints of thumb
Extensor pollicis longus: Origin
Posterior surface of shaft of ulna
Extensor pollicis longus: Insertion
Base of distal phalanx of thumb
Extensor pollicis longus: Innervation
Deep branch of radial nerve; C7-8
Extensor pollicis longus: Action
Extends distal phalanx of thumb
Extensor indicis: Origin
Posterior surface of shaft of ulna
Extensor indicis: Insertion
Extensor expansion of index finger
Extensor indicis: Innervation
Deep branch of radial nerve; C7-8
Extensor indicis: Action
Extends metacarpophalangeal joint of index finger
