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The vagus nerve participates in the autonomic changes that accompany sleep, but it is not a sleep switch. NREM sleep generally brings lower cardiovascular...

Vagus nerve stimulation (VNS) can influence the autonomic nervous system by changing vagal signaling through brainstem networks that regulate heart rate, blood pressure, and...

Feeling foggy after a meal can mean different things. Sometimes it is mostly sleepiness after a heavy lunch. Other times, concentration gets harder and...

If brain fog gets worse when you are stressed, it is easy to blame cortisol. Stress can affect concentration and memory, and cortisol is...

To think clearly under pressure, make the task easier for your brain to handle. Stress can make it harder to hold information in mind,...

The sleep biohacks that help most are consistent sleep timing, sensible light and caffeine habits, a comfortable sleep environment, and tools matched to a...

Brain biohacks that help most with focus, memory, and mental clarity are usually the basics: better sleep, regular movement, solid nutrition, enough recovery, and...

You may feel constantly on edge, easily startled, unable to relax, or exhausted even after resting. At other times, the same problem can look...