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gray ramus

a short nerve in the autonomic nervous system that carries unmyelinated postganglionic fibers from a sympathetic ganglion to an adjacent spinal nerve. The fibers within a gray ramus are called gray rami communicantes.

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Psychology term of the day

May 26th 2024



1. adj. having the quality of diminishing or retarding a function or activity of a body system or organ.

2. n. any agent that has this quality, especially a CNS depressant.