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~Sleep and Sleep Disorders - Raeannon Fairlie

~Sleep and Sleep Disorders - Raeannon Fairlie - Sleep and...

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Sleep and Sleep Disorders by RaeAnnon Fairlie [Sleep is] the golden chain that ties health and our bodies together. Thomas Dekker English dramatist (1572 - 1632)
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A Brief History of Sleep Research 1913, Henri Pieron wrote “Le probleme physiologique du sommeil” Nathaniel Kleitman regarded as the father of American sleep research His crucial work included studies of sleep characteristics in different populations and the effects of sleep deprivation In 1953, along with one of his students, Eugene Aserinsky, discovered REM during sleep
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A Brief History of Sleep Research William C. Dement, another of Kleitman’s students, described the cyclical nature of sleep in 1955 Published a paper in 1958 that created an explosion of fundamental research that led Michel Jouvet to identify REM sleep as an independent state of alertness
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Physiology of the Sleep Cycles Waking Stage When the body prepares to rest Stage I 50% reduction in activity May last for 5-10 minutes Stage II Polysomnographic readings show positive and negative waves where there are spontaneous periods of muscle tone mixed with periods of muscle relaxation
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Physiology of the Sleep Cycles Stage III and IV These stages are known as the deep sleep stages Slow-wave or delta waves appear, signaling deep sleep The period of stages I-IV is known as non-REM or NREM sleep These stages last from 90-120 minutes with each stage lasting from 5-15 minutes
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Physiology of Sleep Cycles Stage V When REM sleep occurs there is an increase in heart rate and respiration Face, fingers, and legs may twitch Due to high cerebral activity, intense dreaming occurs in this stage REM sleep is also called paradoxical sleep because the brain is in excitation mode while the muscles are immobilized The first cycle is completed after the first REM stage Each cycle becomes longer as the REM stage extends so a person may go through as many as 5 cycles a night
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Restless Legs Syndrome
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Brief History The term was first introduced in 1945 by Karl-Axel Ekbom
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