sleep restoration explanation
- Created by: mollskie49
- Created on: 07-06-13 19:09
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- restoration explanation
- sws
- Growth hormone – in kids stimulates growth and in adulthood enables protein synthesis and cell growth
- Vital proteins are fragile must be constantly renewed
- GH secreted in pulses throughout the day more so at night
- Sassin et al – when sleep-wake cycles are reversed by 12h the release of GH also reversed
- GH release controlled by neuro-mechanism related to SWS
- GH and SWS +vely correlated so both decrease with old age
- GH release controlled by neuro-mechanism related to SWS
- Sassin et al – when sleep-wake cycles are reversed by 12h the release of GH also reversed
- GH secreted in pulses throughout the day more so at night
- Vital proteins are fragile must be constantly renewed
- Growth hormone – in kids stimulates growth and in adulthood enables protein synthesis and cell growth
- immune system
- SWS associated with reduced immune system functioning – Krueger et al
- Immune system consists of proteins and molecules that are regenerated in SWS cell growth
- SWS associated with reduced immune system functioning – Krueger et al
- REM sleep
- Brain growth
- REM proportional to the immaturity of the infant at birth
- Platypus 8h REM because immature, dolphin almost none – Segel
- Relationship between neural development and REM
- Platypus 8h REM because immature, dolphin almost none – Segel
- REM proportional to the immaturity of the infant at birth
- Brain growth
- neurotransmitter
- Segel and Rogawske – REM allows break in neurotransmitter release permits neurons to regain sensitivity allows body to function properly
- Support comes from actions of antidepressant drugs e.g MAOIs
- Drugs increase level of neurotransmitters of the monoamine group such as dopamine and serotonin
- MAOIs abolish REM completely
- Two effects linked, increase in monoamines means that monoamine receptors don’t have to be revitalised so no need for REM
- MAOIs abolish REM completely
- Drugs increase level of neurotransmitters of the monoamine group such as dopamine and serotonin
- Support comes from actions of antidepressant drugs e.g MAOIs
- Segel and Rogawske – REM allows break in neurotransmitter release permits neurons to regain sensitivity allows body to function properly
- REM and memory
- Unwanted memories are discarded - Important accessible
- more complex r/s between memory and sleep
- REM important in consolidation of procedural memories
- SWS sleep is important for consolidation of semantic memories and episodic memories
- REM important in consolidation of procedural memories
- more complex r/s between memory and sleep
- Unwanted memories are discarded - Important accessible
- Effects of total sleep deprivation
- Individual case studies – lack of sleep doesn’t always result in long term damage, don’t need to recover amount of sleep lost
- Deprived of sleep 22h had short periods of microsleep (while awake) EEG recordings show microsleep is same as sleep – Williams
- Individual case studies – lack of sleep doesn’t always result in long term damage, don’t need to recover amount of sleep lost
- Non-human animal studies
- Sleep deprivation can have fatal consequences
- – kept rats awake by rotating them on a disc when they tried to sleep, after 33 days all rats were dead. Possibly due to stress because study was repeated with pigeons with no ill effects
- Sleep deprivation can have fatal consequences
- Effects of partial sleep deprivation
- REM rebound, need for more sleep after a night of being deprived
- Solely related to REM and SWS so the rebound effect only applies if the person is deprived of SWS or REM
- To achieve REM sleep deprivation volunteers were awoken as soon as entered REM, REM on recovery nights increased by 50%
- SWS uses acoustic simulation to rouse pps – Ferrara
- To achieve REM sleep deprivation volunteers were awoken as soon as entered REM, REM on recovery nights increased by 50%
- Solely related to REM and SWS so the rebound effect only applies if the person is deprived of SWS or REM
- REM rebound, need for more sleep after a night of being deprived
- Exercise and the need for sleep
- marathon runners slept about an hr more on 2 nights after race, SWS increased
- (SWS) NREM associated with physical recovery
- General research – exercise makes you fall asleep faster but you don’t sleep longer
- Horne and Minard – gave pps exhausting tasks and pps went to sleep faster but not longer
- General research – exercise makes you fall asleep faster but you don’t sleep longer
- (SWS) NREM associated with physical recovery
- marathon runners slept about an hr more on 2 nights after race, SWS increased
- case studies
- Deprivation research restricted to case or observational studies of small group
- Peter Tripp stayed awake 201h and hallucinated unpleasant and abusive became paranoid showed continuous decline in body temp throughout, by end his waking brainwaves were indistinguishable from that of a sleeping person, but back to normal once he slept for 24h
- Vietnamese man stopped sleeping entirely in 1973 with no ill effects
- Peter Tripp stayed awake 201h and hallucinated unpleasant and abusive became paranoid showed continuous decline in body temp throughout, by end his waking brainwaves were indistinguishable from that of a sleeping person, but back to normal once he slept for 24h
- Deprivation research restricted to case or observational studies of small group
- sws
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