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DEEP MUSCLE, ACTION, MUSCLE, MUSCLE, NERVE SUPPLY, ORIGIN (O) AND…
DEEP MUSCLE
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MUSCLE
Pronator quadratus (kwod-ra'tus) (quad - square, four-sided)
DESCRIPTION
Deepest muscle of distal forearm; passes downward and laterally; only muscle that arises solely from ulna and inserrts solely into radius
Prime mover of forearm pronation; acts with pronator teres; also helps hold ulna and radius together
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NERVE SUPPLY
Branch of median nerve (C8,1-1)
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0—coronoid process, anteromedial surface of ulna, and interosseous membrane I—by four tendons into distal phalanges of second to fifth fingers
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