Postganglionic fibers

Acetylcholine

Norepinephrine

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]

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Overview

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.

See also

• Preganglionic fibers

External links

• Diagram of postganglionic neuron and its synapse at sns-web.org
• Diagram at University of Waterloo