Postganglionic fiber

In the autonomic nervous system, fibers from the ganglion to the effector organ are called postganglionic fibers.

Neurotransmitters
The neurotransmitters used for postganglionic fibers differ:


 * In the parasympathetic division, they are cholinergic (that is, they use acetylcholine as their neurotransmitters.)


 * In the sympathetic division, most are adrenergic (that is, they use norepinephrine as their neurotransmitters.) One exception of this is the sympathetic innervation of sweat glands, which uses acetylcholine as a neurotransmitter at both pre and post ganglionic synapses.