... from 80 to 120 mins. We go through this cycle around 4 to 5 times during an 8 hours period of sleep during the night. Approx. 80% of our sleep time is spent in NREM sleep. Typically the 1st half of the night has more NREM sleep then the second half of the night. REM It is a stage during sleep that is characterized by waves similar to those of ... beta waves. REM tends to being 1.5 hours after we fall asleep and returns 4 or 5 times a night, becoming more frequent and longer as the night progresses. It is during REM sleep that most vivid night dreaming occur. It is where bursts of rapid ...

• Word Count: 2627
• Approx Pages: 11
• Grade Level: High School

... way to determine sleep requirement is by trial and error. Learning how much sleep is necessary is essential to remaining fully awake on the job. Studies have shown the loss of even two hours of sleep during a single night is enough to significantly degrade next-day alertness. (Caldwell 2002) Some studies have suggested, that while on vacation, you should sleep until you wake ... habits. Sleep problems for most adults stem from behavioral or environmental factors. These suggestions may help: Don't take naps during the day. Go to bed and get up at the same time seven days a week. Use the ...

• Word Count: 2786
• Approx Pages: 11
• Has Bibliography
• Grade Level: High School

... a "memory life-cycle", which involves three stages - stabilization, consolidation, and re-consolidation initial stabilization of memories may take as much as six hours Why do we need sleep? A lot of theories have been thrown up over the years as to what we need sleep for (to keep us wandering out of our caves and being eaten by sabertooth tigers, is one ... deprivation affects different cognitive tasks in different ways, and also that parts of the brain are able to at least partially compensate for the effects of sleep deprivation. Sleep deprivation mimics aging? A report in the medical...

• Word Count: 2912
• Approx Pages: 12
• Grade Level: High School

... Shapiro et al (1985), who found that individuals who had completed an ultra-marathon and therefore used up an exceptional amount of resources slept on average an extra 1.5 hours than they normally would for several nights following the race. The individuals involved in this study were also found to spend a considerably greater proportion of total sleep time in SWS, a phase commonly associated with ... Van Cauter (2005), in which findings demonstrated how, prior to the onset of REM sleep, a number of events occur within the body which seem to be linked to an increase in the availability of...

• Word Count: 3321
• Approx Pages: 13
• Has Bibliography
• Grade Level: Graduate