A recent study observed sleeping participants' pupils during sleep, using a new method that could have implications for ...

Friday the 13th lived up to its notorious rep for a Long Island teen — who suffered a stroke that day in December, leading ...

A new study reveals that pupil size fluctuates constantly during sleep, reflecting changes in brain activation levels.

Your brain isn’t stagnant; throughout your lifetime, many changes occur as a result of genetic, hormonal, and environmental factors that accompany emotional, intellectual, and physical milestones, ...