Upper Extremity & Hand - Extensors Flashcards
Triceps Brachii
O: LH: infraglenoid tubercle, MH: posterior humerus below radial groove, Lat H: posterior humerus above radial groove
I: Olecranon process
Innv: Radial
Anconeus
O: lateral epicondyle of humerus
I: olecranon/proimal ulna
Innv: Raidal
brachioradialis
O: lateral supraepicondylar ridge (humerus)
I: distal radius
Innv: Radial
extensor carpi radialis longus
O: lateral supraepicondylar ridge (humerus)
I: base of metacarpal 2
Innv: Radial
extensor carpi radialis brevis
O: lateral epicondyle
I: base of metacarpal 3
Innv: Radial
extensor digitorum
O: lateral epicondyle
I: extensor expansions
Innv: Radial
extensor carpi ulnaris
O: lateral epicondyle of humerus, ulna
I: base of metacarpal 5
Innv: Radial
supinator
O: lateral epicondyle, ulna
I: proximal radius
Innv: radial
abductor pollicis longus
O: ulna, radius, interosseous membrane
I: base of metacarpal 1
Innv: radial
extensor pollicis brevis
O: radius, interosseous membrane
I: proximal phalanx of pollex
Innv: Radial
extensor pollicis longus
O: ulna, interosseous membrane
I: distal phalanx of pollex
Innv: radial
extensor indicis
O: ulna, interosseous membrane
I: extensor expansion of digit 2
Innv: radial
extensor digiti minimi
O: lateral epicondyle of humerus
I: extensor expansion of digit 5
Innv: radial
