Article: In Some Insomnia Patients, Brain Just Won't Shut Down; Abnormal levels of a neurochemical are linked to sleep disorder, study finds.(Report)(Brief article)

TUESDAY, June 9 (HealthDay News) -- Adults with primary insomnia have a neurochemical abnormality that makes it difficult to "shut down" the mind at night for sleep, new research has found.

Researchers measured the levels of gamma-aminobutyric acid (GABA) in 16 adult men and women with primary insomnia and 16 men and women deemed normal sleepers.

Primary insomnia is difficulty falling sleep or staying asleep at night for over a period of at least one month, according to the American Academy of Sleep Medicine. Unlike most cases of insomnia, primary insomnia can't be attributed to a psychiatric, medical or environmental cause.

The new study found ...

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