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 years, researchers have known that the symptoms of Parkinson's disease (PD) result from damage to a specific region of the brain. A new study shows that the disease also causes widespread damage ...

This is the part of your peripheral nervous system that controls the muscles of organs without you having to think about it. Your autonomic nervous system lets your brain manage vital functions, such ...

If you’re wondering why you and your partner are having trouble breaking a negative cycle in your relationship that often leads to conflict, chances are you’re triggering each other’s sympathetic ...