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Article: Insomnia
- Article from:
- Complete Human Diseases and Conditions
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Insomnia
Why Can
’
t I Sleep?
What to Do about Insomnia
Insomnia (in-SOM-nee-a) is a disorder in which people have trouble sleeping or getting enough rest.
KEYWORDS
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Sleep disorders
Sleeplessness
Why Can
’
t I Sleep?
Humans, like all earth
’
s creatures, have cycles of activity and rest, which perhaps evolved partly as a response to the cycles of night and day. Many of the body
’
s
hormones*
and processes are related closely to such daily cycles. Sleep provides the opportunity to rest, to restore certain essential
neurotransmitters*
, and even to avoid certain predators. Sleep, in short, is ...