Preganglionic Autonomic Fiber

**Semantic type:** Body Part, Organ, or Organ Component

**Definition:** An axon that projects from a nerve cell body within the central nervous system and innervates a cell within an autonomic ganglia. Preganglionic sympathetic fibers use acetylcholine as transmitters, sometimes with peptide cotransmitters.

**Synonyms:** - Autonomic Fibers, Preganglionic - Preganglionic Fiber