n :  any of the three nerves connecting the cervical ganglia of the sympathetic nervous system with the cardiac plexus  a  :  one arising esp. from the inferior cervical ganglion or the stellate ganglion - called also inferior cardiac nerve   b  :  one arising esp. from the middle cervical ganglion - called also middle cardiac nerve   c  :  one arising esp. from the superior cervical ganglion - called also superior cardiac nerve  .
 
 
 
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