Wrist Flashcards
Pronator quadratus
O: anterior aspect of distal one quarter of ulna
I: anterior aspect of distal 1/4 of radius
A: forearm pronation
Extensor pollicis brevis
O: posterior surface of distal 1/2 of radius and adjacent interosseous membrane
I: dorsal aspect of base of proximal phalanx of thumb
A: thumb extension
Extensor indices
O: posterior surface of distal 1/3 of ulna and adjacent interosseous membrane
I: extensor expansion of index finger
A: index finger extension
Extensor carpi radialis brevis
O: lateral epicondyle of humerus, via common extensor tendon
I: dorsal aspect of base of 3rd metacarpal
A: wrist extension and abduction
Flexor pollicis longus
O: anterior surface of radius and adjacent interosseous membrane
I: palmar aspect of base of distal phalanx of thumb
A: thumb flexion
Flexor digitorum profundus
O: medial aspect of coronoid process of ulna, superior 3/4 of anterior and medial surfaces of body of ulna
I: palmar aspects of bases of the distal phalanges of 2-5 fingers
A: 2-5 finger flexion
Flexor carpi radialis
O: medial epicondyle of humerus, via common flexor tendon
I: palmar aspects of bases of 2nd and 3rd metacarpals
A: wrist flexion and abduction
Flexor digitorum superficialis
O: medial epicondyle of humerus, via the common flexor tendon, sublime tubercle of ulna, and proximal 1/2 of anterior border of radius
I: palmar aspects of the bodies of middle phalanges of 2-5 fingers
A: flexion of 2-5 fingers
Extensor pollicis longus
O: posterior surface of middle 1/3 of ulna and adjacent interosseous membrane
I: dorsal aspect of base of distal phalanx of thumb
A: thumb extension
Abductor pollicis longus
O: posterior aspects of proximal 1/2 of ulna and middle 1/3 of radius, adjacent interosseous membrane
I: lateral aspect of base of 1st metacarpal
A: thumb abduction and extension
Extensor carpi radialis longus
O: inferior 1/3 of lateral supracondylar ridge of humerus
I: dorsal aspect of base of 2nd metacarpal
A: wrist extension and abduction
Flexor carpi ulnaris
O: medial epicondyle of humerus, via common flexor tendon, proximal 2/3 of body of ulna, olecranon of ulna
I: pisiform, hook of hamate, palmar aspect of base of 5th metacarpal
A: wrist flexion and adduction
Extensor carpi ulnaris
O: lateral epicondyle of humerus, via common extensor tendon, and posterior border of ulna
I: medial aspect of base of 5th metacarpal
A: wrist extension and adduction
Extensor digiti minimi
O: lateral epicondyle of humerus, via common extensor tendon
I: extensor expansion of little finger
A: little finger extension
Extensor digitorum
O: lateral epicondyle of humerus, via common extensor tendon
I: dorsal aspects of bases of middle and distal phalanges of 2-5th fingers
A: finger 2-5 extension
