PSY 1 - Notes 3 - Sleep

PSY 1 Notes 3- - Psych 1 Sleep 03:41:00 ← Sleep • The real question is why do we wake up why do we come out of our natural state of dormancy

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Unformatted text preview: Psych 1 - Sleep 10/04/2007 03:41:00 ← Sleep • The real question is why do we wake up/ why do we come out of our natural state of dormancy • no scientist can find anything that we discharge or recharge when we sleep ← Polysomnography ← ← EEG – Electroencephalogram - brain waves - ← EOG – Electrooculogram - eye movments ← EMG – Electromyogram - put electrodes over muscles ← EKG – Electrocardiogram - heart rate ← RR – Respiration rate ← O2 / CO2 saturation / desaturation - in the blood - a lot of people have oxygen starvation periods thoughout the night - if O deprived then you wake up ← ← ← “Dual Sleep” ← ← Non-REM Sleep REM Sleep ← ← Stage 1 ← Stage 2 ← Delta ← ← ← ← EEG Changes During Sleep (Picture) ← ← ← ← Qualities of Dual Sleep ← ← All mammals seem to have dual sleep except monotremes (e.g., anteaters) (echidnas) and cetaceans (e.g., whales). ← Sleep-wake cycle governed by an internal 25-hour circadian rhythm, tuned externally to 24 hr by the sun. ← REM periods alternate with Non-REM periods according to a 90-100 minute ultradian rhythm. ← REM periods last longer as the night progresses. ← REM sleep can be exhausting. ← ← ← ← REM Sleep Across the Life Span (Picture) ← Sleep and Aging ← ← People sleep less as they get older, and the proportion of time in REM sleep decreases. ← Overall sleep gets lighter and wakefulness gets ‘sleepier.’ ← Aging is often accompanied by chronic sleep deprivation due to: illness, pain, breathing problems, frequent need to urinate ← ← ← Stages of Non-REM Sleep ← ← Stage 1 – transition between wakefulness and clear sleep ← ← Stage 2 – first bona fide sleep stage; “point of no return” at onset ← ← Delta – deepest, most restful type of sleep ← Physiological relaxation ← Slow, rolling eye movements ← Mundane “talking” dreams ← Growth hormone secretions ← Deficient thermoregulation ← ← ← Characteristics of REM Sleep ← ← EEG similar to waking state ← Striate muscle tone greatly reduced ← Heightened physiological activity ← Rapid, jerky, desynchronous eye movements ← Erection of sexual tissue ← Vivid visual dreams ← Reduced by nearly all drugs / medications ← Striate muscle tone greatly reduced ← “REM without atonia” ← Sleep paralysis ← ← ← Typical Night’s Sleep ← ← 0’- Go to bed ← 5-10’- Enter Stage 1 Sleep ← 10-15’- Transition from Stage 1 to Stage 2 Sleep ← “Point of No Return” ← (?) Myoclonic jerk ←...
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This note was uploaded on 09/23/2010 for the course PSYC 1 taught by Professor Fridlund during the Fall '09 term at UCSB.

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PSY 1 Notes 3- - Psych 1 Sleep 03:41:00 ← Sleep • The real question is why do we wake up why do we come out of our natural state of dormancy

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