Parasympathetic preganglionic neurons

Cell bodies of the sympathetic preganglionic neurons are part of the lateral gray horns of all thoracic segments and of the first two lumbar segments of the spinal cord.
The paired sympathetic trunk ganglia are anterior and lateral to the vertebral column. Usually, there are 2 cervical, 11 or 12 thoracic, 4 or 5 lumbar, 4 or 5 sacral sympathetic trunk ganglia and 1 coccygeal ganglion.

Cell bodies of the parasympathetic preganglionic neurons are located in nuclei in the brain stem and in the lateral gray matter of the 2nd through 4th sacral segments of the spinal cord. There is a cranial parasympathetic outflow that extends from the brain stem in 4 cranial nerves. The sacral parasympathetic outflow extends from the 2nd through 4th sacral spinal nerves.