9/8/2018 Sleeping.

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Altered States of Consciousness

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Presentation transcript:

9/8/2018 Sleeping

Target Goal: Students will be able to describe the sleep cycle and understand processes that impact sleep.

Waking Consciousness Demo- You tube link http://www.youtube.com/watch?v=Ahg6qcgoay4&safety_mode=true&persist_safety_mode=1 Selective Attention ? Inattentional Blindness?

EEG Waves of Wakefulness 9/8/2018 EEG Waves of Wakefulness 1 second Alpha waves Awake, nonattentive 1 second Beta waves Awake, attentive Keywords: EEG, alpha waves, beta waves, wakefulness

How Long is a day? Industrial World- 24 hours 9/8/2018 How Long is a day? Industrial World- 24 hours Body ‘s Circadian Clock 24 hours 18 min Keywords: electroencephalogram, EEG

9/8/2018 Circadian Rhythm Any rhythmic change that continues at close to a 24-hour cycle in the absence of 24-hour cues body temperature cortisol secretion sleep and wakefulness - Suprachiasmatic Nucleus Keywords: circadian rhythm

How do I fall asleep? Step one- Circadian Clock influenced by SCN =Suprachiasmatic Nucleus Step Two-Ventrolateral Preoptic Nucleus ( sleep master switch) turns off Brain arousal system ( reticular formation)

How do I fall asleep cont… Step Three- Pons directs neurochemicals ( GABA) to regulate sleep Step Four- Circadian Clock regulates body temp Decrease at sleep, increase at wake

Theta- The

Scary- Sleep Spindles

Demon- Delta

Sees Dead- Slow Delta

Bodies- Beta … Rapid Eye Movement

How much sleep do I need? Children: Newborns- 17 hrs sleep ( 50% in REM) 4 Year olds- 10 hrs ( 25-30% in REM) As we age… Adolescents- 10 hours a day- Later clocks Adults( by age 20) 7-8 hours 20% or less in REM

Can I “cheat” sleep? Effects on Brain: Effects on Body: Minimal effect on Heart rate, blood pressure, hormone secretions Impact Immune function ( T- cell count) Effects on Brain: Irritability, Unhappiness Lower concentration on mundane tasks Hallucinations

What are the major sleep disorders ? 9/8/2018 What are the major sleep disorders ? Keywords: somnambulism, nightmares, night terrors, narcolepsy, sleep apnea

Somnambulism

Nightmares

Night Terrors

Narcolepsy

Sleep Apnea

Individual Differences in Sleep Drive 9/8/2018 Individual Differences in Sleep Drive Nonsomniacs - sleep far less than most, but do not feel tired during the day Insomniacs - has a normal desire for sleep, but is unable to and feels tired during the day Keywords: nonsomniacs, insomniacs

Teens and Sleep Cycles Sleep Survey Results http://www.pbs.org/wgbh/pages/frontline/video/flv/generic.html?s=frol02p392&continuous=1 (Frontline-Teens and sleep)