Ch6_ppt_-_States_of_Consciousness_Compatibility_Mode_

Bassil psyc 202 brain to culture environmental

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Unformatted text preview: cortex illogical & bizarre illogical emotional REM dreams dreams M. Bassil PSYC 202 Brain to Culture Environmental factors Season change fall & winter sleep 15-60 mins more Season Shift work decreased decreased sleep quality Stress Night-time noise Cultural norms In tropical climates, 1-2-hr midday nap ritual reduces hr length length of night-time sleep. time Some sleep on floors, on hammocks. Co-sleeping: may be the norm (children sleeping with may parents) parents) M. Bassil PSYC 202 15 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 11/4/2009 How Much Do We Sleep? Sleep Sleep varies with age & from one person to another another Newborns sleep 16 hrs, half are REM As we age, - We sleep less: (19-30y) 7- 8hrs; elderly < 6hrs 8hrs; - REM sleep decreases as we reach childhood - Time spent in stages 3 & 4 decreases; little slowwave sleep as we reach old age M. Bassil PSYC 202 Sleep Patterns Do we need Eight Hours of Nightly Sleep? NO. Few function well on little sleep, but are NO. rare rare Why the differences in sleeping patterns? Genes (identical twins have similar patterns) Nongenetic factors day vs. night jobs, low-key vs. high-pressure pressure lifestyles, lifestyles, quiet vs. noisy environments M. Bassil PSYC 202 16 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 11/4/2009 Sleep Deprivation Experimental study “Short-term total sleep deprivation” (up to 45 hrs), “longterm (up term term total sleep deprivation” (>45 hrs), & “partial (>45 “partial deprivation” (no more than 5 hrs on 1 or more consecutive nights) (no Results: Results: impaired functioning on all types of deprivation (Mood, (Mood, Cognitive abilities, Physical performance,……all performance,……all slacked) M. Bassil PSYC 202 Sleep Deprivation Deprived Deprived of one night’s sleep ►perform more perform poorly poorly on critical-thinking task (underestimate thinking negative negative effects) Case Study of 11-day deprivation: day First few days, ► irritable, forgetful, nauseated First By 5th day, ► disorientation & mild hallucinations day, disorientation Over last 4 days, ► finger tremors & slurred Over finger speech speech Beat Beat sleep researcher in pinball type game 100 consecutive times, slept 15 hrs straight, & took a week week to to recover (we don’t make up for all time lost) M. Bassil PSYC 202 17 Create PDF files without this message by purchasing novaPDF printer (http://www.novapdf.com) 11/4/2009 Why Why Do We Sleep? (1) (1) Sleep & Body Restoration Restoration model: sleep recharges our run-down sleep down bodies & allows us to recover from physical & mental fatigue function better Daily Daily wear (exercise) only 10 mins more sleep & only mins more more more slow-wave sleep What What gets restored? No precise answers Adenosine (a cellular waste product): accumulates to inhibit (a accumulates circuits respon...
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