radial nerve
nounMedical Definition of radial nerve
: a large nerve that arises from the posterior cord of the brachial plexus and passes spirally down the humerus to the front of the lateral epicondyle where it divides into a superficial branch distributed to the skin of the back of the hand and arm and a deep branch to the underlying extensor muscles
— called also
musculospiral nerve, nervus radialis
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