gray rami communicantes

gray ra·mi com·mu·ni·can·tes

[TA]
short nerves arising from the lateral aspect of the sympathetic trunk conducting nonmyelinated postsynaptic sympathetic nerve fibers from the sympathetic trunk to the initial portions of all 31 pairs of ventral primary rami of spinal nerves for distribution by all parts (including the dorsal primary ramus) of the spinal nerve. The gray rami are the parietal branches of the sympathetic trunks because all postsynaptic fibers to be distributed to the body wall (including limbs) must pass through them.
Farlex Partner Medical Dictionary © Farlex 2012
References in periodicals archive ?
The development of the cervical sympathetic ganglia may get arrested at some stage and this leads to marked individual variations of the ganglia and its gray rami communicantes. [1]