The staff would then compile a printed survey, containing as many as 30 or 40 individual summaries of projects uncovered in the search. Each project is summarized, with detailed medical description, including methodology, results, and conclusions. Whenever the Center's staff conducts a survey of the current medical literature, we must gather information from the various commercial database that specialize in supplying professional and technical summaries. Because most of these databases serve health professionals, they are not always available to the public. So, we have worked out a way to charge you a simple flat fee, which covers staff time, the cost of data retrieval, and preparation of the printed survey.
Insomnia is a broad term for a wide range of sleep disorders, or disturbed sleep patterns.
Sleep is, however, known to be necessary for survival, but its precise physiological function is still uncertain. Individual requirements vary, and range from as few as four hours to as many as nine hours per day. Causes of insomnia may be physical, psychological, or some combination of the two. Symptoms of insomnia also vary and are too subjective to try to list. Nearly always, though, symptoms include drowsiness during the day and unrest during the night.