Sleep - circadian, ultradian, infradian
- Created by: mollskie49
- Created on: 05-06-13 20:56
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- Sleep
- Biological rhythms
- the circadian rhythms
- sleep wake cycle
- external clues
- internal clock
- important flaw
- artificial light
- down to 22hrs - up to 28hrs
- artificial light
- individual differences
- cycle length varies 13- 64
- cycle onset
- morning people - rise early and go to bed early
- evening people rise late and go to bed late
- core body temp
- lowest 430
- highest 600 pm
- trough around lunch - when people dont eat
- linked with cognitive abilities
- stories read either at 9am or 3pm
- 3pm group had higher body temp and retained 8% more material
- performance on IQ test was higher at 7pm than 9am or 2pm
- only evidence in lab settings
- no significant difference in field setting
- high bt = increased arousal = cognitive performance
- no significant difference in field setting
- stories read either at 9am or 3pm
- hormones
- cortisol lowest midnight peaks 6am
- melatonin + growth hormone peak 12 am
- sleep wake cycle
- infradian and ultradian
- ULTRADIAN - 5 stages of sleep - first 4, NREM - 5th REM
- lasts 90 mins
- awake
- stage 1
- stage 2
- stage 3
- stage 4
- stage 5
- beta waves - similar to walking state
- activity in visual cortex of the brain
- vivid dreams
- activity in visual cortex of the brain
- beta waves - similar to walking state
- theta and delta waves
- more than 50% delta
- parasomnias most likely to occur
- more than 50% delta
- stage 5
- delta and theta waves
- delta - lower frequences and greater amplitude
- dreaming common but disorganized
- delta - lower frequences and greater amplitude
- stage 4
- theta waves sleep spindles + k-complex
- spindles - burst of very rapid brain activity
- k complex linked with memory consolidation
- spindles - burst of very rapid brain activity
- stage 3
- alpha + theta waves
- lower fequency greater amplitude
- stage 2
- alpha and beta waves
- high frequency - low amplitude
- stage 1
- awake
- assume REM sleep is dreaming sleep
- dreams recorded outside of REM
- sometimes no recorded dreams in REM
- dreams recorded outside of REM
- psychological readouts of electrical signs (dreams)
- theory based on REM sleep
- lasts 90 mins
- INFRADIAN
- female menstrual cycle
- pituitary glad releases hormones - stimulates follicles in 1 ovary trigger the release of estrogen
- the ruptured follicle - stimulated progesterone - increases lining of the womb
- 2 weeks - no pregnancy - progesterone reduced womb lining shed
- normally governed by endogenous system
- several women living together - no contraceptives - menstruate at same time - exogenous clues
- collected sweat samples
- menstraul cycle synced with donor - affected by pheramones
- collected sweat samples
- several women living together - no contraceptives - menstruate at same time - exogenous clues
- normally governed by endogenous system
- 2 weeks - no pregnancy - progesterone reduced womb lining shed
- the ruptured follicle - stimulated progesterone - increases lining of the womb
- PMS - has symptoms - increased accidents, lower acheivement accademically
- pituitary glad releases hormones - stimulates follicles in 1 ovary trigger the release of estrogen
- SAD - seasonal affective disorder
- depressed during winter months - recover during summer
- melatonin and serotonin - more darkness - more melatonin - less serotonin
- low serotonin associated with depression
- melatonin and serotonin - more darkness - more melatonin - less serotonin
- consequence of disrupted circadian rhythm
- get up same time go to bed earlier
- system gets impression times shifting
- results similar to jet lag
- system gets impression times shifting
- get up same time go to bed earlier
- phototherapy
- lights between 6000 - 10,000 lux
- maybe due to placebo effect
- 32% did improve with placebo effect
- maybe due to placebo effect
- lights between 6000 - 10,000 lux
- Untitled
- depressed during winter months - recover during summer
- female menstrual cycle
- ULTRADIAN - 5 stages of sleep - first 4, NREM - 5th REM
- the circadian rhythms
- Biological rhythms
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