"Deep sleep builds your immune system, and REM sleep regulates and fine-tunes it," says Darwall-Smith agrees. During deep ...

However, some research shows that major stressors may increase REM sleep but reduce deep sleep. REM rebound, which is when we ...

This is especially true, according to the experts at The Sleep Foundation, for REM sleep. On their website, The Sleep Foundation states: “REM is involved in a host of important functions ...

For the past century, the University of Chicago has been a pioneer in sleep research—from opening the world’s first laboratory devoted to sleep research to discovering REM sleep. Today, UChicago ...