The sympathetic nervous system, which helps your heart and other vital organs function all the time, increases activity in response to danger or stress, preparing the body for extra demands. Stress is ...

The sympathetic nervous system—the fight or flight side—gets stuck in overdrive, while the parasympathetic nervous system (PSNS)—which should bring the body back to a calm, regulated state—gets ...

In a review published in the journal Advanced Science, researchers discussed the interplay of the immune system and the sympathetic regulation of vital metabolic organs such as the pancreas, intestine ...

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.

Stretching can be helpful, but it’s often not the full answer. If your nervous system is stuck in fight or flight, muscles ...

Your autonomic nervous system helps regulate emotional balance, but chronic stress or trauma can trigger an overactive fight-or-flight response. Nervous system dysregulation refers to a condition in ...