Neuroscience suggests overthinking isn’t solved by more thinking — it’s interrupted by the body, because the vagus nerve carries roughly 80% of its signals upward from gut to brain, not the other way around
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The vagus nerve is a two-way road with badly unbalanced traffic. Roughly 80 percent of its fibres are believed to carry signals upward, from the organs to the brain, and only about 20 percent carry instructions back down — a ratio widely cited in neurophysiology research and discussed in recent Scientific American coverage of vagus nerve research. That single anatomical fact reframes what happens when a person is stuck in a rumination loop at 2 a.m. The body is not waiting for the brain to figur
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