<P> There are two kinds of neurons involved in the transmission of any signal through the sympathetic system : pre-ganglionic and post-ganglionic . The shorter preganglionic neurons originate from the thoracolumbar region of the spinal cord specifically at T1 to L2 ~ L3 , and travel to a ganglion , often one of the paravertebral ganglia , where they synapse with a postganglionic neuron . From there , the long postganglionic neurons extend across most of the body . </P>
where do the cell bodies of preganglionic neurons of the sympathetic nervous system originate
from the thoracolumbar region of the spinal cord specifically at T1 to L2 ~ L3