ramus communicans

noun
ramus com·​mu·​ni·​cans | \ -kə-ˈmyü-nə-ˌkanz How to pronounce ramus communicans (audio) \
plural rami communicantes\ -​kə-​ˌmyü-​nə-​ˈkan-​ˌtēz How to pronounce rami communicantes (audio) \

Medical Definition of ramus communicans

: any of the bundles of nerve fibers connecting a sympathetic ganglion with a spinal nerve and being divided into two kinds:
a : one consisting of myelinated preganglionic fibers

called also white ramus, white ramus communicans

b : one consisting of unmyelinated postganglionic fibers

called also gray ramus, gray ramus communicans

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