To use the Sleep Cycle app, you set the alarm and lay the iPhone face down on your bed.
Maciek Drejak, lead developer of Sleep Cycle, says the app does record small movements, but when analyzing your sleep patterns, it "filters" the ones it doesn't think are relevant.
It then waits till you fall asleep then starts the timer, waiting for you to get roughly 26.5 minutes of shuteye, before rousing you during a light sleep cycle.
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In a company-funded study published last year in the Journal of Sleep Research, the Zeo predicted the same sleep cycle as professional sleep equipment in a lab about 75% of the time, compared with 86% agreement for two independent professional lab measures with each other.
Impairment in the body's internal clock, ultimately disrupting a person's sleep-wake cycle, is just one of the potential symptoms of dementia.
Melatonin products are usually synthetic versions of the hormone made naturally by the pineal gland, in the brain, which helps regulate the body's sleep-wake cycle.
Sharing a bed may also reduce cytokines, involved in inflammation, and boost oxytocin, the so-called love hormone that is known to ease anxiety and is produced in the same part of the brain responsible for the sleep-wake cycle.
Dr. Daniel Hanley, professor of neurology at Johns Hopkins Medicine, in Maryland, told CNN that VS is a coma-like state in which patients have a sleep and wake cycle, and can show reflex chewing, swallowing and blinking, but don't respond to language or stimulation.
Melatonin is a hormone produced in a gland in the brain, and helps maintain the natural cycle of sleep and wake.
Insomnia poses a vicious cycle for some patients: They can't sleep ?????? because they worry too much about the fact that they can't sleep.
Obesity increases the chances of developing sleep apnea, a condition that combines choking and waking in an exhausting, sometimes life-threatening cycle.
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