![]() ![]() The researchers point out that sleep usually involves 90-minute cycles of brain activity during which there are periods when the brain is most arousable. However, many people use an alarm clock to wake them at a set time, which is when problems occur for some of us. After waking naturally, we recognize changes that have occurred, as we feel rested and more alert. Although the precise functions of sleep remain a mystery, sleep is important for normal motor and cognitive functions as well as growth and rejuvenation of the immune, nervous, skeletal and muscular systems. We spend about one-third of our lives asleep. ![]() Sleep is a behavioral state that is a natural part of every individual's life. "By using such an alarm clock, the user will wake feeling much more refreshed than if they were awakened by a conventional alarm clock that rings at a set time," explains Jemina Asnoth Sylvia of Jerusalem College of Engineering in Tamil Nadu. Writing in a forthcoming issue of the International Journal of Biomedical Engineering and Technology, the researchers describe an alarm clock that monitors your brain activity and triggers its alarm within a time window you set in advance but only when your brain is in a more easily roused state rather than deep sleep. ![]()
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