But in the case of the autonomic we usually have two neurons in our electrical pathway. We have a pre ganglionic neuron and a post ganglionic neuron. Now in the case of the somatic system we only use the cetylcholine neurotransmitter. In the autonomous case we use acetylcholine as well as in some cases epinephrine and norepinephrine. So now let's discuss the sympathetic and the parasympathetic divisions of the autonomic nervous system. Now let's begin with our sympathetic case.