This is a review of the relationship of neurochemistry to behavior. Most of the common neurotransmitters and neuromodulators are introduced. Special emphasis is given to the involvement of neurochemistry in mental disorders. (BB)

Reports that amphetamine given to normal boys resulted in a marked decrease in motor activity and reaction time, and improved performance on cognitive test, a response similar to those observed in hyperactive children. (SL)

Reviews recent research in the treatment and cause of hyperactivity in children. (SL)

Reports that a number of minor physical anomalies, assessable soon after birth, are significantly related to a cluster of behaviors at age three that are frequently labeled hyperactivity. (SL)