SUNDAY, Nov. 2, 2025 (HealthDay News) — The human body is packed with natural rhythms, from your sleep-wake cycle to the steady pulsing of blood through the brain to heart rate and pulse.

Now, scientists say the gut may hold the key to understanding how this complex coordination happens in the brain’s blood vessels.

Researchers at the University of California San Diego have discovered that the gut’s rhythmic muscle movements could help explain how blood vessels in the brain expand and contract together. Their findings were published recently in the journal Physical Review Letters .

When neurons in the brain are stimulated, tiny blood vessels called arterioles expand to deliver more oxygen and nutrients.

These vessels pulse and are often in sync with one another. But for years, scie

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