(Attention Deficit Disorder)
a syndrome affecting children, adolescents, and adults characterized by short attention span, hyperactivity, and poor concentration. The symptoms may be mild or severe and are associated with functional deviations of the central nervous system without signs of major neurologic or psychiatric disturbance. The people affected are usually of normal or above average intelligence. Other symptoms include impairment in perception, conceptualization, language, memory, and motor skills; decreased attention span; increased impulsivity; and emotional lability. The condition is 10 times more prevalent in boys than in girls and may result from genetic factors, biochemical irregularities, perinatal or postnatal injury, or disease. There is no known cure, and symptoms often subside or disappear with time. Some treatments include abstinence from certain foods, such as those that contain caffeine, and food additives.

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