02:55
The Great Mystery: Stages of Sleep
Sleep and dream research is part of the scientific study of consciousness. Both the body and brain are quite active during sleep. The frequencies and amplitudes of the EEG recorded during sleep reveal two primary types of sleep: REM sleep (rapid eye...
01:51
The Great Mystery: REM Sleep
During REM sleep eye movement and brainwaves are very active, but everything else seems paralyzed. Even the thermoregulatory system does not work during REM sleep. Newborn infants sleep about 16 hours a day, half of which is REM sleep. This leads re...