All of the following are true about grey communicans except:
U nmyel inated
Connects to spinal nerves
Pregang I ion ic
Present medial to the white ramus cornmunicans
Ans. c. PreganglionicEach spinal nerve receives a branch called a gray ramus communicans from the adjacent paraveebral ganglion of the sympathetic trunk. The gray rami communicans contain postganglionic nerve fibers of the sympathetic nervous system and are composed of largely unmyelinated neurons. This is in contrast to the white rami communicans, in which heavily myelinated neurons give the rami their white appearance. "The gray ramus communicans connects the sympathetic trunk or a ganglion to the anterior ramus and contains the postganglionic sympathetic fibers. It appears gray because postganglionic fibers are nonmyelinated. The gray ramus communicans is positioned medial to the white ramus communicans."