The preganglionic fibers that carry visceral motor fibers and connect a spinal nerve with an sympathetic ganglion form the

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The white rami communicans are the preganglionic fibers that carry visceral motor fibers and connect a spinal nerve with a sympathetic ganglion. The gray rami communicans, on the other hand, are postganglionic fibers that carry visceral motor fibers from a sympathetic ganglion to an effector organ. The posterior ramus innervates the deep muscles and skin of the back, while the anterior ramus innervates the rest of the body. Dermatomes are areas of skin innervated by a single spinal nerve.

The Preganglionic Fibers That Carry Visceral Motor Fibers and Connect