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musculature /inervation/action/origin/insertion

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show ORIGIN:capitate and base of adjacent metacarpals. INSERTION:proximal phalanks of thumb.NERVE:deep branch of ulnar.ACTION:draws thumb toward palm and rotates it medialy.  
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show ORIGIN:tendons of flexor digitorum profundus.INSERTION:extension expansion hood of medial 4 digits.NERVE:deep branch ulnar(medial 2 L's) median (lateral 2 L's).ACTION:flexes fingers and extends interphalgeal joints.  
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Dorsal Interosseous Muscles   show
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Palmar Interosseous   show
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show ORIGIN: anterior retinaculum and palmer aponeurosis.INSERTION:skin ulnar border of hand.NERVE:superficial ulnar. ACTION:pulls on skin over thenar eminence, deepening cup of the palm and improving grip.  
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Abductor Pollicus Brevis   show
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show ORIGIN:flexor retinaculum trapezium. INSERTION: thumb. NERVE: median thenar branch. ACTION:Flexes the thumb at the first metacarpophalangeal joint.  
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show ORIGIN: flexor retinaculum, trapezium. INSERTION:radial border 1st metacarpal. NERVE:median thenar branch.ACTION:draws 1st metacarpal laterally to opose the thumb toward center of palm and rotates it medially.  
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Abductor digiti minimi   show
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Flexor digiti minimi   show
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show ORIGIN:flexor retinaculum,hamate.INSERTION:ulnar medial border(5th metacarpal).ACTION:draws 5th metacarpal anteriorly and rotates it,bringing little finger into oposition with the thumb.  
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