Although childhood hyperactivity and inattention have been described in medical literature since as early as the 18th century, it was not until 1987 that the term “Attention-Deficit Hyperactivity Disorder” appeared in the Diagnostic and Statistical Manual of Mental Disorders...Jennifer Kaminski, PhD, with CDC’s National Center on Birth Defects and Developmental Disabilities, told Infectious Diseases in Children that ADHD has gained medical credibility in the last 3 decades, partly as a result of neuroimaging studies that provide visible evidence of the ways ADHD affects the brain.