accessory phrenic nerve
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n.
Any of the accessory nerve strands that arise from the fifth cervical nerve, often as branches of the nerve to the subclavius, and pass downward to join the phrenic nerve.
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American Heritage Stedman's Medical Dictionary
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company.
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