Posterior forearm Flashcards
Brachioradialis
superficial group
O: Lateral border of distal end of humerus
I: Superior to styloid process of radius
A: Flexion of forearm at elbow joint
N: Radial nerve
Extensor Carpi Radialis Longus
superficial group
O: Lateral supracondylar ridge of humerus
I: Base of 2nd metacarpal
A: Extension and abduction of hand at wrist joint
N: Radial nerve
Extensor Carpi Radialis Brevis
Superficial group
O: Lateral epicondyle of humerus
I: Base of 3rd metcarpal
A: extension and abduction of hand at wrist joint
N: Radial nerve
Extensor Digitorum
superficial group
O: Lateral epicondyle of the humerus bone
I: Middle & distal phalanges of digits 2-5
A: Extension of digits 2-5 & extension of hand at wrist joint
N: Radial nerve
Extensor Digit Minimi
superficial group
O: Lateral epicondyle of humerus
I: Tendon of extensor digitorum on the 5th phalanx
A: Extension of the 5th digit
N: Radial nerve
Extensor Carpi Ulnaris
superficial group
O: Lateral epicondyle of the humerus bone & posterior border of ulna
I: Base of 5th metacarpal
A: Extension & adduction (ulnar deviation) of hand at wrist joint
N: Radial nerve
Anconeus
superficial group
O: Lateral epicondyle of humerus
I: Olecranon of ulna
A: Extension of forearm at the elbow joint
N: Radial nerve
Supinator
Deep group
O: Lateral epicondyle of humerus bone and supinator crest of ulna
I: Lateral proximal 1/3 of radius
A: Supination of forearm at radio-ulnar joint
N: Radial nerve
Abductor Pollicis Longus
deep group
O: Posterior middle surface of radius and ulna & interosseous membrane
I: Base of 1st metacarpal
A: Abduction and extension of thumb & abduction of hand at wrist joint
N: Radial nerve
Extensor Pollicis Brevis
deep group
O: Posterior middle surface of radius & interosseous membrane
I: Base of proximal phalanx of thumb
A: Extension of proximal phalanx of thumb, extension of 1st metacarpal & abduction of hand at wrist joint
N: Radial nerve
Extensor Pollicis Longus
deep group
O: Posterior middle surface of ulna and interosseous membrane
I: Base of distal phalanx of thumb
A: Extension of distal phalanx of thumb, extension of 1st metacarpal and abduction of hand at wrist joint
N: Radial nerve
Extensor Indicis
deep group
O: Posterior distal surface of ulna & interosseous membrane
I: Blends into tendon of extensor digitorum of 2nd digit
A: Extension of index finger & extension of hand at wrist joint
N: Radial nerve
