People who spend more of their night in rapid-eye-movement sleep report more intense, story-like dreams, and two federal ...

REM is the sleep cycle stage when dreaming occurs. Rapid eye movement "dream sleep" occurs cyclically about every 90 minutes in between the other "dreamless" stages of non-REM (NREM) sleep. Source: ...

New research on brainwaves in the thalamus shows patterns distinctly linked to conscious states.

New research reveals that neurons in the preoptic hypothalamus -- the region of the brain that regulates sleep and body temperature -- are rhythmically activated during non-rapid eye movement sleep ...

Humans and other mammals cycle through distinct sleep phases. One of them is easily recognized by the darting motion of the eyes behind closed lids, giving it its name: REM (rapid eye movement) sleep.

Experts believe pets can experience unpleasant dreams or nightmares. Dogs may whimper or growl while sleeping. While cats may ...