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The Science of Sleep

also known as THE SCIENCE OF SLEEPING What goes on in your mind when you're in bed? When you sleep your body rests and restores itself. However, sleep is an active state that affects both your physical and mental well-being. Sleeping is a natural cycle of activity in the brain and consists of two basic states: rapid eye movement (REM) and non-REM sleep, which consists of four stages. WHAT IS REM SLEEP? WHAT IS NREM SLEEP? The period of REM sleep is marked by extensive physiological changes. It is the only sleep stage in which you dream. REM sleep occurs 90 minutes after sleep onset. The first period of REM typically lasts 10 minutes with each recurring REM stage The period of NREM sleep is made up of stages one through four. Each stage can last from five to fifteen minutes. Stages two and three repeat backwards before REM sleep is attained. lengthening until the final one - which lasts one hour. HYPNOGRAM Hours of Sleep First Second Third Fourth Fifth Cycle Cycle Cycle Cycle Cycle Awake -Brief Awakening Falling Asleep, REM Dreaming, Waking up Light Sleep Stage1 Medium Stage 2 Sleep Stage 3 Deep Sleep Very Deep Sleep Stage 4 Rem increases during the second half of the night. ABOUT THE SLEEP STAGES EEG Tracings Brain Activitty Physical Activity Stage Intense dreaming occurs as a result of heightened cerebral activity. Heart rate and respiration speed up and become erratic. The face, fingers, and legs might twitch. REM Brain waves are small and short. If Stage 1 awoken, you may not realize you were asleep. Eyes are closed. Might last five to ten minutes. During light sleep, brain waves start to spike. Heart rate slows and the body temperature decreases. Stage 2 As sleep deepens, brain waves are the slowest but have the deepest amplitude. Stage 3 Low muscle activity. The brain is least responsive to outside stimulation. Rhythmic breathing. Limited muscle activity. Stage 4 10 TIPS FOR BETTER SLEEP Having trouble sleeping? Change your sleep habits for a better night's rest. 1: Go to bed and get up at the same 2: Don't eat or drink large amounts before bedtime. time every day, even on weekends. 3: Avoid nicotine, caffeine and alcohol 4: Exercise regularly. in the evening. 5: Make your bedroom cool, dark, quiet and comfortable. 6: Sleep primarily at night. 7: Go to bed when tired and turn out 8: Start a relaxing bedtime routine. the lights. 9: Choose a comfortable mattress 10: Use sleeping pills only as a and pillow. last resort. CONCLUSION You may not remember more than a little part of your dreams when you wake up, but your brain and your body may do more when you are sleeping than when you are awake. All of that action is important to your health in ways that scientists continue to explore. If you frequently have trouble sleeping, you aren't getting all the benefits of the sleep patterns. You could have a sleep disorder and should see your doctor. Sources

The Science of Sleep

shared by Overstock on Aug 30
Ever wondered what goes on in your brain when you're asleep? If you thought REM is just the name of a band, think again. There's a science to the way you sleep, and it's anything but a snooze-fest. Le...



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