An inactive state resembling deep sleep in which certain animals living in cold climates pass the winter. In hibernation, the body temperature is lowered and breathing and heart rates slow down. Hibernation protects the animal from cold and reduces the need for food during the season when food is scarce. Compare estivation.
Does Dreaming Indicate a Good Nightâs Sleep? Dreams are typically indicative of a good nightâs sleep, demonstrating that you have passed through the light sleeping phase (NREM) and entered into a deep sleep (REM).
(Day dreaming/thinking). Dreams have different lengths during the time of sleep, the first ''episode'' is always the shortest that can last from 1/2minutes to 10min and then dreams progressively increase. The last dream is the longest and it can last up to 20min. We usually have about 2 or 3 dreams if someone ever fells like they've had more it's just because a ''memory effect''. Dreams take place during an electrophysiological state of sleep, so called REM sleep (rapid eye movement).