Insomnia

Insomnia (or sleeplessness) is most often defined by an individual's report of sleeping difficulties. While the term is sometimes used in sleep literature to describe a disorder demonstrated by polysomnographic evidence of disturbed sleep, insomnia is often defined as a positive response to either of two questions: "Do you experience difficulty sleeping?" or "Do you have difficulty falling or staying asleep?"

Thus, insomnia is most often thought of as both a sign and a symptom that can accompany several sleep, medical, and psychiatric disorders, characterized by persistent difficulty falling asleep and/or staying asleep or sleep of poor quality. Insomnia is typically followed by functional impairment while awake. One definition of insomnia is difficulties initiating and/or maintaining sleep, or nonrestorative sleep, associated with impairments of daytime functioning or marked distress for more than 1 month."

Insomnia can be grouped into primary and secondary, or comorbid, insomnia. Primary insomnia is a sleep disorder not attributable to a medical, psychiatric, or environmental cause. A complete diagnosis will differentiate between:

This text uses material from Wikipedia licensed under CC BY-SA

Latest Spotlight News

Scientists discover gene controlling muscle fate

Scientists at the University of New Mexico have moved a step closer to improving medical science through research involving muscle manipulation of fruit flies. They discovered in the flight muscles of Drosophila ...

Cohabiting couples differ on contraceptive use by class

Most cohabiting couples intend to delay childbirth until they're married, steadily employed and financially stable. Despite these preferences, surprise pregnancies are common, particularly among working-class men and women ...

Gut bacteria promote obesity in mice

A species of gut bacteria called Clostridium ramosum, coupled with a high-fat diet, may cause animals to gain weight. The work is published this week in mBio, the online open-access journal of the American Society for Microbiol ...

Researchers explain 38-year-old mystery of the heart

In a new study published in Proceedings of the National Academy of Sciences, researchers at the University of Alberta's Faculty of Medicine & Dentistry have explained how the function of a key protein in the ...

Modeling shockwaves through the brain

Since the start of the military conflicts in Iraq and Afghanistan, more than 300,000 soldiers have returned to the United States with traumatic brain injury caused by exposure to bomb blasts—and in particular, ...