Health 110 Sleep Topic W'2010

Health 110 Sleep Topic W'2010 - 9/24/2010 Sleep Research...

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9/24/2010 1 Sleep Research indicates getting adequate sleep is critical to maintaining good health. Characteristics of Sleep Body temperature lowers to conserve energy. Person changes position about once or twice an hour during sleep. Blood supply is increased to muscles. Hormones are secreted- stimulate growth & repair of the body’s tissues. Help prevent certain types of cancer ex. growth hormone, melatonin, leptin. Immune system becomes more active to promote resistance to viral and bacterial infections. Memory consolidation. Heart rate slows down. Different brainwave activity occurs-REM (rapid eye How Sleep Works-Circadian Rhythm Latin- circa -around + diem -day= one day (24 hour clock). Controlled by the body’s biological clock. Regular changes in mental and physical characteristics that occur in the course of a day. Adults tend to fall asleep most easily between 1-4 am and 1-4 pm More difficult to fall asleep between 9-11am and 7-9 pm (S. Coren, UBC). Teenagers-challenged with irregular sleeping hours and sensitivity to light. Circadian Rhythm-Human Clock-24 Hour Cycle (website: wikimedia commons) Sleep Stages-Stage 1 Light sleep. Muscle activity slows down. Stage 2 Light sleep. Muscle activity slows. Breathing pattern and heart rate slows. Decrease in body temperature. Stage 3 Deep sleep.
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9/24/2010 2 Stage 4 Very deep sleep. Rhythmic breathing. Limited muscle activity.
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Health 110 Sleep Topic W'2010 - 9/24/2010 Sleep Research...

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