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How Sleep Affects Our Skinby Lori Stryker
Many consider sleep to be of low priority among the many daily activities engaged in. It is estimated that the world's population is depriving itself of one less hour of sleep per night than is needed (Awake!, 2004). Despite this view of night-time rest, sleep is a necessary, sophisticated process regulated by the brain. Operating as a 24- hour clock, chemical substances, such as melanin, are released in the body to trigger sleepiness.
There are two main stages of sleep classified according to eye movement. The first is REM or rapid eye movement which is a shallow, dream-filled sleep. There are four sub-stages within REM sleep. The first sub-stage lasts 30 seconds to 7 minutes, and during this time the muscles relax while the brain produces irregular wave activity. The second sub-stage lasts 20 percent of the night and brain waves become larger as the body is asleep. The next sub-stage is called delta sleep, where growth hormones peak, and cell and tissue repair take place. 
Without delta sleep, which accounts for half of a night's sleep, one will feel tired the next day. Every 90 minutes the brain enters the dream sub-stage, where brain wave activity is similar in pattern to being awake, but muscles are not able to move as when awake. This stage lengthens each repeated cycle during the night, and is crucial to preserving mental health and long term memory, since the brain sorts through short term memory and 'deletes' unimportant data. The second major stage of sleep is non-REM, or non rapid eye movement, where blood pressure drops and heart rate slows as the person enters a deep sleep. Short term sleep deprivation causes little physical harm, since the body compensates for the lack of sleep by increasing its adrenaline levels during the day. The body also attempts to get more sleep at a later time. A temporary shift in attitude may occur, such as feelings of pessimism or negativity (Bricklin, 1990). Sleep deprivation, even short term, can be dangerous if driving a car, or operating machinery. Sleep deprivation is thought to be the cause of half of all traffic fatalities on U.S. highways, and being awake 17 to 19 hours can cause the same limited reaction and ability as having a 0.05 percent blood alcohol limit (Awake! 2004). It is also implicated in many workplace accidents. Chronic sleep deprivation, which is caused by prolonged shortages of sleep, can lead to paranoia or hallucinations. This is also termed 'sleep debt', and is characterized by irregular sleep patterns that do not allow the body to enter delta sleep. This can bring on a short attention span, memory and vocabulary loss as Obtaining a good night's rest can be achieved. The following are suggestions to help towards the goal of night-time rest:
How can you know if you are a healthy sleeper?
Getting a good night's rest refreshes the body, mind and attitude. It is as vital to our health as good food and exercise. The phrase "beauty rest" is more than a quaint idea, it is a fundamental task in the quest for external and internal beauty. References:
ABOUT THE AUTHOR: Lori Stryker has been researching and developing all natural skin care and make-up for the purpose of offering men and women safe, natural cosmetics for everyday use. She brings to her research a specialist in human biology from the University of Toronto, coupled with a professional home economics degree and an education degree from the University of British Columbia, fusing chemical and biological knowledge with food, family and textile sciences.
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Tidbits & Stuff was born on Thursday, March 9, 2006
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Sleep is a "natural, temporary loss of consciousness" (Robinson, 1941) necessary for our bodies to build up energy reserves and regenerate body cells and tissues. During sleep, the heart beats more slowly, breathing becomes slower, growth hormones peak, muscles relax and body temperature lowers. Newborn infants sleep almost continuously, gradually decreasing their need for sleep. In early childhood, 12 to 13 hours of sleep are generally required and this amount decreases to approximately 8 hours in adulthood. After the age of 50, sleep is often characterized by frequent night time wakenings, shorter dream lengths and less overall sleep (Bricklen, 1990).
well as other symptoms. Among women aged 25-50 who tend to be "perfectionists", many tend to suffer from shallow sleep as the wake centre of the brain remains active when it should be relatively inactive. Other complications from sleep deprivation include obesity, premature aging, fatigue, chronic memory loss and increased risk for diabetes, infection, cardiovascular disease and gastrointestinal disease. It is important, therefore, to obtain an adequate amount of sleep each night, since sleep also helps the body metabolize free radicals, which are thought to accelerate aging and cancerous growths.
