Reference The sympathetic nervous system activates the "fight-or-flight" response, quickly readying the body to handle dangerous or stressful situations.

With terrifyingly sharp teeth arranged around a circular mouth, lampreys look about as primitive a vertebrate as you could imagine. But a new study finds that the animals have a surprising similarity ...

Your brain gets all the glory while your other nervous system, the Peripheral Nervous System (PNS) toils away in thankless obscurity. What’s the PNS? Oh, merely the neurons that live outside of your ...

Researchers propose that placozoans, one of the simplest kinds of animals, may contain the blueprint for the neurons of more complex creatures. By Sam Jones For hundreds of millions of years, ...

New research has uncovered shared patterns between ribosomal RNAs and genes linked to brain disorders, including autism, ...

Shimmering, gelatinous comb jellies wouldn’t appear to have much to hide. But their mostly see-through bodies cloak a nervous system unlike that of any other known animal, researchers report in the ...

Difficulty balancing or an inability to do so can be caused by any number of factors. Head injuries, migraines, alcohol use, ear infections and medications can all affect your musculoskeletal system ...

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 ...

Chronic stress rewires the body’s alarm system. Experts share the small, science-backed ways to help it reset.