Special Histology and Embryology: A Practical Course - V. K. Napkhanyuk 2001

Nervous System
Autonomic Nervous System

The Autonomic Nervous system consists of central divisions (nuclei of the grey matter of the Brain AND SPINAL cord) and peripheral divisions (nerve trunks, ganglia, plexuses). It is subdivided into the sympathetic and parasympathetic systems.

A characteristic feature of the autonomic reflex arc is that its efferent limb is always two-neuron. One neuron is located in the central division, while the second is situated in one of the peripheral ganglia.

Preganglionic Neurons are generally cholinergic, including those within the sympathetic nervous system.

Postganglionic neurons in the sympathetic nervous system are adrenergic, whereas in the parasympathetic system they are cholinergic.



Last update: 10/08/2026

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