Sleep Physiology Flashcards
What type of sleep occurs at the start of the night?
non-REM
What type of sleep occurs at the end of the night?
REM
What type of sleep involves synchronised, rhythmic EEG activity, partial muscle relaxation of muscles and reduced cerebral blood flow?
non REM
In what type of sleep does EEG show fast activity, fMRI shows increased brain activity?
REM
Which sleep type is Similar to wakefulness?
REM
In which sleep type is there Narrative dreaming?
REM
Which sleep type is more important?
non-REM
Which type is important in early brain development?
REM
Which drugs suppress REM sleep?
tricyclics
When does cell division peak?
during sleep !
Where are most effects of lack of sleep?
prefrontal - become irritable, suspicious, visual illusions
What do REM parasomnias often precede?P
Parksinsons
Describe symptoms of non-REM parasomnias?
Sleep walking
Sleep terrors - scream at night, do not remember
Sleep paralysis ( can’t move , someone watching you/chasing you)
BOTH AWAKE AND NOT
Bruxism
Restless legs
When does REM parasomnia most often occur?
last 3rd of night
What is narcolepsy?
frequent excessive daytime sleepiness caused by chronic neurological problem
Symptoms of narcolepsy?
Involuntary somnolence during eating/talking
May be severe, and impossible to resist
What is cataplexy?
a medical condition in which strong emotion or laughter causes a person to suffer sudden physical collapse though remaining conscious.
What can be checked in CSF in lumbar puncture?
hypocretin levels - if low, suggest narcolepsy
