Dreaming Dreaming is a form of mental activity that occurs during sleep. The nature of dream activities has been characterized by many clinical and laboratory studies. These studies are more perceptual than conceptual: things are seen and heard rather than being subject to thought. Visual perception is present in almost all dreams, and auditory experience is 40 to 50%, but dreams are not necessarily visual imagery. Congenitally blind people dream in auditory and sensory-motor modes. One difference …showed first 75 words of 1949 total…

…showed last 75 words of 1949 total…the extreme cases, some patients even display all three states at once. The sleep polygraphs will show no signs of sleep even though the individual appears to be asleep. The region of the brain that control the deactivation of the muscle controls is locate on the brain stem, just above the spinal cord. In that region is deactivated, as it normally is during the sleep period, the muscles will be suppressed (J. Siegel) (Nadis, S. 1994)