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Muscles that Move theWrist, Hand and Digits

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This group is know as the extrinsic

muscles that move the wrist, handand digits because they originateoutside the hand and insert within i

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These muscles can be divided intotwo groups on the basis of locationand function.

The muscle of the anteriorcompartmentarm in anatomicaarm in anatomicalpositionposition! function aswhile the muscles of the posteriorcompartmentfunction as

.

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". #lexor

$. %xtensors

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#lexor carpi radialis

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Muscle& #lexor carpi radialis

'rigin& Humerus

(nsertion& Metacarpals $ and )

*ction& #lexes and abducts wris

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+almarislongus

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Muscle& +almaris longus

'rigin& Humerus

(nsertion& #lexor retinaculumand palmar aponeurosis

*ction& #lexes wrist

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#lexor digitorum superficialis

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Muscle& #lexor digitorum

superficialis

'rigin& Humerus, ulna and radiu

nsertion& Middle phalanges ofingers $-

*ction& #lexion at proximalnterphalangeal oint,metocarpophalangeal oint and

wrist oint

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#lexor digitorum profundus

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Muscle& #lexor digitorum

rofundus

'rigin& /lna

nsertion& Distal phalanges ofngers $-

*ction& #lexion at distal androximal interphalangeal oints,

metocarpophalangeal oint and

wrist oint

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#lexor carpi ulnaris

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Muscle& #lexor carpi ulnaris

'rigin& Humerus and ulna

nsertion& +isiform, hamateand metacarpal -

*ction& #lexes and adducts wrist

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#lexes and abducts wrist

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#lexor carpi radialis

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#lexes wrist

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+almaris longus

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#lexion at proximalinterphalangeal oint,metocarpophalangeal oint and

wrist oint

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#lexor digitorum superficialis

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#lexion at distal and proximalinterphalangeal oints,metocarpophalangeal oint and

wrist oint

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#lexor digitorum profundus

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#lexes and adducts wrist

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#lexor carpi ulnaris

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'rigin of Humerus

".

$.

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". +almaris 0ongus

$. #lexor 1arpi 2adialis

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'rigin of /lna

".

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#lexor digitorum profundus

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'rigin of Humerus, ulna and radius

".

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#lexor digitorum superficialis

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'rigin of Humerus and ulna

".

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#lexor carpi ulnaris

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(nsertion at +isiform, hamateand metacarpal -

".

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#lexor carpi ulnaris

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(nsertion at Distal phalanges

of fingers $-

".

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#lexor digitorum profundus

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(nsertion at Middle phalangesof fingers $-

".

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#lexor digitorum superficialis

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(nsertion at #lexor retinaculumand palmar aponeurosis

".

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+almaris longus

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(nsertion at Metacarpals $ and

".

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#lexor carpi radialis

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%xtensor carpi radialis

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Muscle& %xtensor carpi radialis

'rigin& Humerus

(nsertion& Metacarpal $ and )

*ction& %xtends and abductswrist

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%xtensor digitorum

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Muscle& %xtensor digitorum

'rigin& Humerus

(nsertion& +osterior surfaces of

phalanges of finger $-

*ction& %xtension at oints offingers and wrist

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%xtensor digiti minimi

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Muscle& %xtensor digiti minimi

'rigin& Humerus

(nsertion& +osterior surface of

proximal phalanx of little finger

*ction& %xtends oint of littlefinger

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%xtensor carpi ulnaris

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Muscle& %xtensor carpi ulnaris

'rigin& Humerus and ulna

(nsertion& Metacarpal -

*ction& %xtends and adductswrist

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%xtends and abducts wrist

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%xtensor carpi radialis

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%xtension at oints of fingers andwrist

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%xtensor digitorum

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%xtends oint of little finger

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%xtensor digiti minimi

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%xtends and adducts wrist

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%xtensor carpi ulnaris

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(nsertion& Metacarpal -

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%xtensor carpi ulnaris

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(nsertion& +osterior surfaceof proximal phalanx of littlefinger

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%xtensor digiti minimi

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nsertion& +osterior surfaces ofphalanges of finger $-

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%xtensor digitorum

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(nsertion&Metacarpal $ and )

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%xtensor carpi radialis

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'rigin of Humerus

".

$.

).

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%xtensor carpi radialis

%xtensor digitorum

%xtensor digiti minimi

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'rigin& Humerus and ulna

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%xtensor carpi ulnaris