What is happening in that “wave” of nausea that overcomes you right before you vomit?
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It’s like a thermostat. The thermostat senses when the temperature in the house is too hot or too cold and sends signals to the furnace or air conditioner to turn on. The enteric nervous system (ENS) senses when something is wrong in the GI tract and sends signals to the brain to induce vomiting.
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