So these are the two types of neurons that exist within the autonomic nervous system. So in the autonomic division of the peripheral nervous system the neurons that begin at the central nervous system the brain or the spinal cord and extend into the ganglia of our peripheral nervous system remember, the ganglia are simply the groups of cell bodies found inside the peripheral nervous system. These types of cells are known as pre ganglionic neurons. So pre ganglionic neurons begin in the central nervous system and extend into the peripheral nervous system. So this is basically a type of motor neuron. Now, what about post ganglionic neurons?