Being awake when you want to be asleep Often thought of as a problem but may not be Common if people try and spend too long in bed
sleep disorder characterized by difficulty falling or staying asleep or by light restless or poor sleep, causing distress and impaired daytime function
Inability to sleep even in the absence of external impediments, during the period when sleep should normally occur
(in-som-nee-ah) Being awake when you want to be asleep Often thought of as a problem, but may not be Common if people try to spend too long in bed
a subjective complaint of difficulty falling or staying asleep or poor sleep quality Types of insomnia include: initial insomnia - difficulty in falling asleep; middle insomnia - awakening in the middle of the night followed by eventually falling back to sleep, but with difficulty; and terminal insomnia - awakening before one's usual waking time and being unable to return to sleep [DSM-IV]