For the first time, researchers have been able to observe how the pupils react during sleep over a period of several hours. A look under the eyelids showed them that more happens in the brain during ...

As maddening as nonrestorative sleep night after night can be, the consequences go much deeper. Left unaddressed, sleep apnea ...

In the stillness of the night, when the body should lie calm in sleep, something else may be happening beneath the surface. For some people, the dreaming mind turns the body into a stage for sudden ...

The eye of the sleeping subject was kept open with a special fixation device to record the pupil movements for several hours. Our eyes are typically closed when we sleep. However, there is a flurry of ...