Neuroanatomy, Parasympathetic Nervous System
Jacob Tindle, Prasanna Tadi
2020StatPearls25 citations
Abstract
The parasympathetic nervous system (PNS) is one of the two functionally distinct and continuously active divisions of the autonomic nervous system (ANS). It is in opposition to the other, the sympathetic nervous system (SNS). The parasympathetic nervous system predominates in quiet “rest and digest” conditions while the sympathetic nervous system drives the “fight or flight” response in stressful situations. The main purpose of the PNS is to conserve energy to be used later and to regulate bodily functions like digestion and urination.
Topics & Concepts
Autonomic nervous systemNervous systemParasympathetic nervous systemNeuroanatomySympathetic nervous systemNeuroscienceCentral nervous systemMedicineBiologyInternal medicineBlood pressureHeart rateHeart Rate Variability and Autonomic Control