The brain immediately detects when thirst is quenched via neural feedback from the gut and mouth
The brain immediately detects when thirst is quenched through rapid neural and preabsorptive feedback from the mouth and gastrointestinal tract, long before the ingested water is absorbed into the bloodstream.
Multiple papers confirm that thirst is rapidly quenched through preabsorptive neural feedback from the oral cavity and upper digestive tract, allowing the brain to anticipate fluid balance restoration.
Zimmerman CA, Lin YC, Leib DE, Guo L, Huey EL, Daly GE, Chen Y, Knight ZA. Thirst neurons anticipate the homeostatic consequences of eating and drinking.. 2016. https://doi.org/10.1038/nature18950
Demonstrates that thirst-promoting neurons in the subfornical organ respond rapidly to neural feedback from the oral cavity during drinking to anticipate and adjust fluid balance.
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Augustine V, Lee S, Oka Y. Neural Control and Modulation of Thirst, Sodium Appetite, and Hunger.. 2020. https://doi.org/10.1016/j.cell.2019.11.040
Reviews how individual appetite circuits use ingestion-related satiation signals to rapidly quench thirst.
Zimmerman CA, Knight ZA. Layers of signals that regulate appetite.. 2020. https://doi.org/10.1016/j.conb.2020.03.007
Explains that eating and drinking generate sequential layers of feedback signals from different tissues that converge in the brain to regulate thirst.
Grove JCR, Knight ZA. The neurobiology of thirst and salt appetite.. 2024. https://doi.org/10.1016/j.neuron.2024.10.028
Discusses how motivational drives for water are rapidly quenched by preabsorptive signals from ingestion before changes in blood osmolality occur.
Ryan PJ. The Neurocircuitry of fluid satiation.. 2018. https://doi.org/10.14814/phy2.13744
Highlights that thirst is quenched tens of minutes before water reaches circulation, driven by preabsorptive inputs from oropharyngeal and gastrointestinal regions.
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