The sympathetic nervous system was thought to have evolved with jawed vertebrates. But lampreys—jawless, parasitic fish that suck out the blood of their hosts—have a simple one, per recent research.

For example, a team at Caltech has identified two distinct types of neurons in the abdomens of mice that appear to control different aspects of digestion. The finding, reported in the journal Nature, ...

Brain cells are increasingly being found outside the brain, and now researchers have identified specific neurons in the abdomen that control some aspects of digestion. Not all brain cells are found in ...

Why the "rest and digest" system is crucial for well-being Medically reviewed by Steven Gans, MD Stress seriously affects your body, mind, and ability to feel like yourself. While you might feel like ...

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Feelings of anxiety are powered by stress hormones. To reduce anxiety, therapists recommend avoiding thoughts that release stress hormones. To avoid thoughts about the pandemic, we can binge-watch ...