Normal sleep physiology

See PPT talk on sleep.

Epworth sleepiness scale (validated in obstructive sleep apnea)





Sitting and reading


0 = no chance of dozing


Watching TV


1 = slight chance


Sitting inactive in public place (theatre, meeting)


2 = moderate chance


Passenger in car for 1 hour


3 high chance


Lying down to rest in afternoon if possible




Sitting and talking to someone


0-9 = normal


Sitting quietly after lunch without alcohol


10-24 = excessive daytime sleepiness

In car, stopped for few minutes in traffic





International Classification of Sleep Disorders


Dyssomnias (including insomnias and excessive daytime sleepiness)






Sleep disorders associated with mental psychiatric disorders