Your brain stem is the traffic control center for satiety signals. It receives real-time information from your gut—how much you’ve eaten, what you’ve eaten, how stretched your stomach is—and integrates all of this into the feeling of fullness that tells you to stop eating. This happens below conscious awareness. You don’t calculate when to stop; you feel full. That feeling is the brain stem’s output.
This companion explores the two systems regulating eating, the gut-brain highway via the vagus nerve, why meal termination isn’t conscious, and what generates strong satiety signals. (4 min read)