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Each year, Americans spend an estimated billion on sleep medications and make almost 2 million overnight visits to sleep laboratories, and it cost Americans an estimated 0 billion annually in lost productivity, medical expenses, sick leave, and property and environmental damage. Although sleep is a basic behavior in animals as well as humans, researchers still do not completely understand all of its functions in maintaining health. For light, because of the connections between the eye and light can directly affect the sleep and wake rhythm.
This pacemaker like mechanism gradually becomes established during the first months of our life, and start to control ups and downs of physiological patterns, such as body temperature, blood pressure, the release of hormones (i.e, melatonin, and cortisol), digestive juice secretions, urine production, and the timing of sleep and wakefulness.
The Western Medicine and Ayurvedic Management of Sleep Disorders By: Sanghee Chon Introduction Everyone sleeps. It looks so easy, and nothing much to it, but why are over 40 million Americans diagnosed with long term sleep disorders? Each of these patterns and dozens more have a daily rhythms, and they are called the Circadian Rhythms .
The National Sleep Foundation(NSF), in their 2005 survey indicates 75 percent of adults had at least one symptom of a sleep problem, such as waking a lot during the night or snoring, and 54 percent experienced at least one symptom of insomnia. The Circadian Rhythm of sleep and wakefulness makes a person’s desire for sleep strongest between midnight and dawn, with a second smaller peak in the middle of the afternoon between 2pm to 3pm.
This stage has been described as an “Active brain in a paralyzed body”, and the dreaming sleep stage occurs during REM sleep.
For Time Cues, a person reads a clock to follow work and transportation schedules, and obey social demands to remain alert for certain tasks and events, and with this, there’s continual pressure to stay on schedule thus help the circadian clock adhere to a twenty-four hour schedule.
The stage 2 sleep is commonly seen in the transition between other sleep stages, and overall about half the night is usually spent in stage 2 sleep.
One very interesting aspect of stage 2 sleep is that about every two minutes, EEG tracings show a pattern called a , which scientists think represents a sort of built-in vigilance system that keeps oneself poised to be awakened if necessary since K-complexes can provoked by certain sounds or other external or internal stimuli.
According to sleep scientists, Deep sleep seems to be a time for ones body to renew and repair itself, because during deep sleep stage, less blood flow is directed toward the brain, which cools the brain measurably as well as at the beginning of this stage the pituitary gland releases a pulse of growth hormone that stimulates tissue growth and muscle repair.
Dreaming sleep stage: Scientists don’t really know if dreams have deep meaning, but just as a deep sleep stage restores our body, dreaming sleep stage restores our mind in part by clearing out the irrelevant information.