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Preganglionic nerve fibers
In the
autonomic nervous system
, fibres from the
CNS
to the
ganglion
are known as
preganglionic fibers
. All preganglionic fibers, whether they are in the
sympathetic division
or in the
parasympathetic division
, are
cholinergic
(that is, these fibers use
acetylcholine
as their
neurotransmitter
) and can be either unmyelinated or
myelinated
.
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