Sleep Flashcards
When do brain waves slow down?
Non-REM stages 1-4
Non-REM sleep is?
Deep sleep
Most important part of sleep?
Non-REM
Sleep onset and the responses?
Homeostatic response: Longer you are awake, sleepier you become
Emotional response: Emotionally ready to go to sleep
Circadian rhythm: body clock has to be in line
What does circadian rhythm do?
Controls sleepiness
Missing one day of sleep is equivalent to?
3 pints of beer
Parasomnia?
Sleep disorder
Can be REM or non-REM
Non-REM parasomnias?
Involve partial awakenings from deep sleep
-Don’t involve dreaming and often person can perform complex tasks they may not remember
Examples of non-REM parasomnias?
Confessional arousals Sleep walking Sleep terrors Sleep paralysis Bruxism Restless legs Periodic limn movement
REM parasomnias involve?
Dreaming and behaviour is usually more simple
What do REM parasomnias often preced?
Parkinson’s disease but can occur on their own
What is narcolepsy?
Abnormalities of brain NT hypocretin/orexin which is a regulator of sleep
What is narcolepsy characterised by?
- XSive daytime sleepiness
- Cataplexy
- Hypnagogic hallucinations
- Sleep paralysis
Cataplexy?
Sudden loss of muscle tone leading to head droop or even falling with intact awareness
-Basically paralysed but can still hear
Investigations with narcolepsy?
Overnight polysomnography
Multiple sleep latency tests shows rapid transition from wakefulness to sleep and a short time to onset of REM sleep
