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? Well, post ganglionic neurons are simply those neurons that synapses that connect to our pre ganglionic neuron. So the pre ganglionic neuron begins at the central nervous system. It extends into the peripheral nervous system and then it connects with the post ganglionic neuron.