When people sleep, they go through a four stage cycle which lasts for about 90-120 minutes and repeats itself about four to five times on average, but may repeat as many as seven times in one night. Dreams may occur through any of the four stages, but are most remembered by people in the last stage of sleep known as the Rapid Eye Movement (REM) stage. In this stage of sleep, the dreamer's eyes move back and fourth rapidly, and occurs about 90-100 minutes after they fall asleep. Also in REM sleep, the dreamer's blood pressure rises and their heart rate and respiration speeds up, and their voluntary muscles are paralyzed. Most people have several dreams in one given night, but they usually only remember very little about them. A person who lacks dream activity could have protein deficiency or a personality disorder (dreamfacts). There are five major characteristics of dreams. One is that most dreams consist of familiar people to the dreamer. The second... [continues]
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