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attention deficit hyperactivity disorder |
Also found in: Dictionary/thesaurus, Medical, Acronyms, Wikipedia, Hutchinson | 0.07 sec. |
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attention deficit hyperactivity disorder (ADHD), formerly called hyperkinesis or minimal brain dysfunction, a chronic, neurologically based syndrome characterized by any or all of three types of behavior: hyperactivity, distractibility, and impulsivity. Hyperactivity refers to feelings of restlessness, fidgeting, or inappropriate activity (running, wandering) when one is expected to be quiet; distractibility to heightened distraction by irrelevant sights and sounds or carelessness and inability to carry simple tasks to completion; and impulsivity to socially inappropriate speech (e.g., blurting out something without thinking) or striking out. Unlike similar behaviors caused by emotional problems or anxiety, ADHD does not fluctuate with emotional states. While the three typical behaviors occur in nearly everyone from time to time, in those with ADHD they are excessive, long-term, and pervasive and create difficulties in school, at home, or at work. ADHD is usually diagnosed before age seven. It is often accompanied by a learning disability.
The cause of ADHD is unknown, although there appears to be a genetic component in some cases. Intake of sugars, preservatives, and artificial flavorings is no longer considered to be a factor. It has been shown that people with ADHD have less activity in areas of the brain that control attention. Treatment usually includes behavioral therapy and emotional counseling combined with medications such as methylphenidate hydrochloride (Ritalin) or dextroamphetamine (Dexedrine) that correct neurochemical imbalances in the brain. Symptoms may decrease after adolescence, although they often persist into adulthood. |
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? Mentioned in | ? References in periodicals archive | |
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2000) A procedure to teach self-control to children with attention deficit hyperactivity disorder. UCB, Brussels, Belgium, has successfully completed the European Mutual Recognition Procedure (MRP) for Equasym(TM) XL for use in the treatment of the symptoms of attention deficit hyperactivity disorder (ADHD) with the UK acting as the Reference Member State for the MRP. In the 4 to 14 age group, 14% of children have a mental health problem--commonly depressive disorders, conduct disorders and attention deficit hyperactivity disorder (3/5/05: Sydney Morning Herald, p. |
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