2007-11-13

2007-11-13 - •Read Chapter 7 pages...

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Unformatted text preview: 2007-11-13•Read Chapter 7, pages 250-280•Consciousness – a complex and mysterious but key human characteristics•Sleep – 25 years of our lifeoBiological rhythms and rhythms of the natural worldSleep and the Brain•Falling AsleepoRegulated by basal forebrain and regions of brainstemDecrease in neurochemical causing wakefulness (narcolepsy)•REM SleepoRegulated by brainstem (reticular formation)oLimbic system activity increasesoAssociation areas near visual cortex activeoMotor cortex active but signals blockedoDecreased activity in prefrontal cortexPlanning and executive functioningSleep and the Environment•Impact of Environmental FactorsoChanges in seasonoShift work, stressoNoiseIncrease arousal and heart rateDecrease time in deep, slow-wave sleepIncrease time in less restful sleepSleep Deprivation•Three Types of Sleep Deprivation StudiesoShort-term (up to 45 hours without sleep)oLong-term (more than 45 hours)oPartial (no more than 5 hours / night for 1 or more consecutive nights)•Summary of Studies:oAverage sleep deprivation function at level of bottom 9% of non-sleep deprivedoNegative impact on functioningMood suffered mostFollowed by cognitive and physical performance...
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2007-11-13 - •Read Chapter 7 pages...

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