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Midbrain serotonergic neurons are central pH chemoreceptors
Journal article   Peer reviewed

Midbrain serotonergic neurons are central pH chemoreceptors

Wengang Wang, Christopher A Severson, Vincent A Pieribone, George B Richerson and Carolin I Dohle
Nature neuroscience, Vol.6(11), pp.1139-1140
11/2003
DOI: 10.1038/nn1130
PMID: 14517544

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Abstract

Serotonergic neurons in the medulla are central respiratory chemoreceptors. Here we show that serotonergic neurons in the midbrain of rats are also highly chemosensitive to small changes in CO2/pH and are closely associated with large penetrating arteries. We propose that midbrain raphé neurons are sensors of blood CO2 that maintain pH homeostasis by inducing arousal, anxiety and changes in cerebrovascular tone in response to respiratory acidosis.

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