These students were also the most likely to receive an adequate number of hours of sleep in a day (Saeeed, 2015). “Biphasic sleep corresponds to the body's instinctive circadian rhythm, hormonal regulation, and memory creation” (Saeed 2015). However, biphasic sleepers were more likely to oversleep than monophasic sleepers. Polyphasic students need to wake up more frequently than monophasic and biphasic students. This gives them more opportunity to oversleep, which may be why the percentage is so much higher. Saeed never predicted that one group would outperform the other, but he wanted to study the relationship between sleep patterns and academic performance. Polyphasic sleepers have the least amount of REM sleep, which is important for memory formation. REM sleep comes after the third stage of sleep. “REM sleep mediates priority processing of emotional memories within the hippocampus” (Hutchinson and Rathore, 2015). Rapid eye movement sleep is the most important and deepest part of sleep (Thompson, 2014). “Body tissues heal and regenerate during non-REM sleep, and brain tissue heals during REM sleep” (Thompson, 2016). There are many other factors that influence sleep. Some participants may be more physically active, while others spend their free time on the computer or in social gatherings. College students aren't the only group feeling the effects of a demanding schedule. Night shift
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