Sleep Deprivation Flashcards
EEG findings with sleep deprivation
Reduced alpha activity on awake EEG with eyes closed, increased delta and theta activity while awake.
Sleep stages in sleep deprivation
Increased delta and REM sleep
Effect of sleep deprivation on blood gases
Increases pCO2
When during the day is reduced vigilance with sleep deprivation the greatest
Evening and early morning.
Ventilatory response to sleep deprivation (hypercapnia and hypoxia)
Flattened CO2 response curve but no effect on the hypoxia response.
Percentage of blind people with free-running circadian rhythm
About two-thirds
Most common cause of irregular sleep-wake rhythm disorder
Dementia
Mood disorders are associated with what circadian rhythm abnormality
Delayed sleep phase
What circadian rhythm abnormality is a sleep log not required
Jet lag
How is melatonin sampling done?
Usually through measurement of salivary melatonin levels
What three diagnostic criteria required for all circadian rhythm disorders
Disrupted sleep-wake pattern
Insomnia, sleepiness, or both
Suboptimal daytime performance
Sleep problems in dementia - how to regularize sleep.
Regularize wake up time is the most important.
