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44 Cards in this Set
- Front
- Back
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In an experiment of 4 young men who were sleep deprived for 200 hrs, what ws the only task that showed significant deficits in ability?
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the vigilance task where they had to sit at a screen and respond to it. Even only one nights sleep depriv showed sig reduction in performance. even those not sleep depr lose concentration after 10-15mins. Even 4hrs sleep loss can affect perf on a vigilance task.
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In this same study they hooked up the guys to an EEG. What did they find during the vigilance task?
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that they were taking microsleeps. The EEG was showing brainwaves reminiscent of stage 1 or 2 sleep. Eyes were open but not responding to stimuli. were not even aware that they had missed a target on the screen and were oblivious to any microsleeps that were happening.
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What impact did sleep deprivation have on mood?
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increased emotional lability. same response to any lack of biological necessity or to increased stress. maybe lack of REm was impacting on mood.
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When the 4 guys were allowed to recover after sleep deprivation, what happened?
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on first and second night increased sleep significantly, but by third night was back to normal.
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Why was the recovery sleep less than expected?
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it could be that the microsleeps were taking the edge off the sleep pressure.
it could be that the recovery sleeps were very efficient with less SOL, less stage 1, an increase of stage 4 and REM |
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What type of sleep was there more of on the first recovery night and what type on the second recovery night?
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More delta on the first recovery night.
More REM on second recovery night. |
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What happened to the rats in the sleep deprivation study?
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they died after 15 days. Similar thing happens in Fatal familial disease where the individuals die after 4-6mths.
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What happens when REM is repressed?
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there is a REM rebound effect. the longer its deprived the greater the amount of REM on subequent nights.
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What effect does alcohol have on REM/
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significant alcohol consumpt will suppress REM. This will keep happening night after night if you drink night after night. Eventaully when you go on the wagon the REm rebound is significant. Some say that the hallucinations that occurr along with the DTs at sleep onset might be REM splilling over into waking life.
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What are the physiological changes that occur when one is deprived of REM?
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Accelerated heart rate
Lower electrocovulsive shock increased body temp |
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What are the physiological changes that occur when one is deprived of REM?
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Accelerated heart rate
Lower electrocovulsive shock increased body temp |
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What are the physiological changes that occur when one is deprived of REM?
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Accelerated heart rate
Lower electrocovulsive shock increased body temp |
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What are the physiological changes that occur when one is deprived of REM?
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Accelerated heart rate
Lower electrocovulsive shock increased body temp |
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What are the psychological effects of REM deprivation?
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emotional lability
short term memory not vigilance anxiety manic/hyperactivity |
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What are the psychological effects of REM deprivation?
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emotional lability
short term memory not vigilance anxiety manic/hyperactivity |
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What are the psychological effects of REM deprivation?
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emotional lability
short term memory not vigilance anxiety manic/hyperactivity |
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What are the physiological changes that occur when one is deprived of REM?
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Accelerated heart rate
Lower electrocovulsive shock increased body temp |
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Which builds up more quickly, REm pressure or stage 4 sleep pressure?
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stage 4, this is what gets caught up on first in recovery sleeps.
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What are the psychological effects of REM deprivation?
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emotional lability
short term memory not vigilance anxiety manic/hyperactivity |
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What are the psychological effects of stage 4 deprivation?
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depressed, lethargic, less tolerant to pain.
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What are the psychological effects of REM deprivation?
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emotional lability
short term memory not vigilance anxiety manic/hyperactivity |
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Which builds up more quickly, REm pressure or stage 4 sleep pressure?
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stage 4, this is what gets caught up on first in recovery sleeps.
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Which builds up more quickly, REm pressure or stage 4 sleep pressure?
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stage 4, this is what gets caught up on first in recovery sleeps.
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Which builds up more quickly, REm pressure or stage 4 sleep pressure?
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stage 4, this is what gets caught up on first in recovery sleeps.
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What are the psychological effects of stage 4 deprivation?
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depressed, lethargic, less tolerant to pain.
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What are the psychological effects of stage 4 deprivation?
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depressed, lethargic, less tolerant to pain.
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if you got 6-7 hours of sleep but they were interrupted every 4 mins of so, would you feel OK?
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NO
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if you got 6-7 hours of sleep but they were interrupted every 4 mins of so, would you feel OK?
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NO
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Do short interruptions to sleep affect overall functioning during day?
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no
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Do short interruptions to sleep affect overall functioning during day?
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no
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If you had an interruption of say 4 hrs or more, would you then get more delta wave sleep?
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yes
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If you had an interruption of say 4 hrs or more, would you then get more delta wave sleep?
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yes
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Which builds up more quickly, REm pressure or stage 4 sleep pressure?
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stage 4, this is what gets caught up on first in recovery sleeps.
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What are the psychological effects of stage 4 deprivation?
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depressed, lethargic, less tolerant to pain.
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if you got 6-7 hours of sleep but they were interrupted every 4 mins of so, would you feel OK?
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NO
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Do short interruptions to sleep affect overall functioning during day?
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no
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If you had an interruption of say 4 hrs or more, would you then get more delta wave sleep?
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yes
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What are the psychological effects of stage 4 deprivation?
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depressed, lethargic, less tolerant to pain.
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if you got 6-7 hours of sleep but they were interrupted every 4 mins of so, would you feel OK?
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NO
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Do short interruptions to sleep affect overall functioning during day?
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no
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If you had an interruption of say 4 hrs or more, would you then get more delta wave sleep?
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yes
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if you got 6-7 hours of sleep but they were interrupted every 4 mins of so, would you feel OK?
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NO
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Do short interruptions to sleep affect overall functioning during day?
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no
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If you had an interruption of say 4 hrs or more, would you then get more delta wave sleep?
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yes
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