Medically reviewed by Sanja Jelic, MD As we sleep, our brain moves through four stages and two phases: non-rapid eye movement ...

It has the slowest brain waves, so it’s sometimes called ... but currently that deepest portion is just considered part of stage 3.) REM sleep is so named because this is where we have ...

The body relaxes further. Stage 3: This is the deepest stage of sleep. Heart rate, breathing, and brain waves become more regular. Stage 3 is also called slow-wave sleep. Stage 4: This stage is also ...

Medical News Today looks at four recent studies to examine which aspects of health and behavior can influence a person's risk ...

The key? Looking for brain waves that match those resembling typical sleep patterns, according to the study published in Nature Medicine. “We’re at an exciting crossroad in neurocritical care where we ...