Parasympathetic nervous system
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|Parasympathetic nervous system|
|Autonomic nervous system innervation, showing the parasympathetic (craniosacral) systems in blue.|
|Latin||Pars parasympathica divisionis autonomici systematis nervosi|
The parasympathetic nervous system (PSNS) is part of the autonomic nervous system. The parasympathetic nervous system can be thought of as "rest and digest" as opposed to the "fight-or-flight" effects of the sympathetic nervous system.