A circuit in the brains of mice that regulates thirst has been identified. When the circuit is switched on, mice began drinking water in spite of being fully hydrated. A second set of cells suppresses the urge to drink. The thirst-regulating circuit is located in a region of the brain called the sub-fornical organ (SFO). "We view the SFO as a dedicated circuit that has two elements that likely interact with each other to maintain the perfect balance, so you drink ...
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