Muscles acting on the hand
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18 Terms
palmaris longus
A: flexes hand
O: medial epicondyle of humerus
I: palmar fascia
Flexor carpi radialis
A: flexes and abducts hand
O: medial epicondyle of humerus
I: metacarpals 2 and 3
Flexor carpi ulnaris
A: flexes and adducts hand
O: medial epicondyle of humerus and ulna
I: pisiform, hamate, metacarpal 5
Flexor digitorum superficialis
A: flexes proximal and middle phalanges 2-5, flexes hand
O: medial epicondyle of humerus, coronoid process of ulna, proximal radius
I: middle phalanges of digits 2-5
Flexor digitorum profundus
A: flexes phalanges, flexes hand
O: ulna, interosseus membrane
I: distal phalanges of digits 2-5
flexor pollicis longus
A: flexes thumb and hand
O: anterior portion of radius and interosseus
I: distal phalanx of pollex
flexor pollicis brevis
A: flexes thumb
O: trapezium
I: proximal phalanx of digit 1
abductor pollicis brevis
A: abducts thumb
O: scaphoid, trapezium
I: proximal phalanx of digit 1
opponens pollicis
A: opposes thumb
O: trapezuim
I: metacarpal 1
abductor digiti minimi
A: abducts digit 5
O: pisiform
I: proximinal phalanx of digit 5
flexor digiti minimi brevis
A: flexes digit 5
O: hamulus of hamate
I: proximal phalanx of digit 5
opponens digiti minimi
A: opposes digit 5
O: hamulus of hamate
I: metacarpal 5
extensor carpi radialis longus
A: extends and abducts hand
O: lateral supracondylar ridge of the humerus
I: metacarpal 2
Extensor carpi radialis brevis
A: extends and abducts hand
O: lateral epicondyle of humerus
I: metacarpal 3
extensor carpi ulnaris
A: extends and adducts hand
O: lateral epicondyle of humerus, proximal ulna
I: metacarpal 5
extensor digitorum
A: extends phalanges 2-5, extends hand
O: lateral epicondyle of humerus
I: middle and distal phalanges of digits 2-5
abductor pollicis longus
A: abducts and extends thumb, abducts hand
O: posterior radius and ulna, interosseus membrane
I: metacarpal 1
extensor pollicis brevis and longus
A: extends thumb
O: posterior radius and ulna, interosseus membrane
I: proximal and distal phalanges of pollex