radial nerve

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ra·di·al nerve

[TA]
arises from the posterior cord of the brachial plexus conveying fibers from all roots of the plexus; it curves around the posterior surface of the humerus and passes down to the cubital fossa where it divides into its two terminal branches, the cutaneous superficial and the motor deep; it supplies the muscles of the posterior compartments of the arm and forearm and overlying skin. The radial nerve is most commonly injured by fractures of the middle third of the humerus, resulting in a loss of extension at the wrist ("wrist drop").

ra·di·al nerve

(rā'dē-ăl nĕrv) [TA]
Arises from the posterior cord of the brachial plexus; it curves around the posterior surface of the humerus and passes down to the cubital fossa, where it divides into its two terminal branches, the superficial and deep; it supplies muscular and cutaneous branches to the posterior compartments of the arm and forearm. The radial nerve is most commonly injured by fractures of the middle third of the humerus, resulting in a loss of extension at the wrist ("wrist drop").
Synonym(s): nervus radialis [TA] .

radial nerve

One of the main nerves of the arm and hand. The radial nerve is a mixed motor and sensory nerve. It supplies the forearm muscles that straighten the flexed wrist and conveys sensation from the back of the forearm and hand.