Components of the autonomic nervous system

The autonomic nervous system comprises: Parasympathetic (cholinergic) system

Cranial outflow: 4 cranial nerves (III, VIII, IX, X) u t

Sacral outflow: S2, S3, S4 segments g o

Sympathetic (adrenergic) system i

Thoracolumbar outflow: T1-L3 segments g

Non-adrenergic non-cholinergic (NANC) system 0

These include the following neurotransmitter systems: S

Purinergic: ATP; GABA a

Peptidergic: neuropeptides 3

Nitrergic: nitric oxide Serotoninergic Dopaminergic GABAergic

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