Melchior Adam Weikard was born on April 27, 1742, near Fulda Germany. He was a physician and a philosopher. Weikard wrote the earliest reference to the behavioral disorder attention deficit hyperactivity disorder (ADHD). He was progressive for his time, believing that illnesses have physical causes and that they are not a result of moral wrongs or the spiritual influences. Weikard died near his birthplace on July 25, 1803.
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