The history of the ADHD started when Sir Alexander Crichton  Nootropictech Mind Tech BrainTrial Review  described it as a mental restlessness during the year 1798 in his book. The term used for the ADHD symptoms has gone through several changes. The term ADHD is objectionable to many people. Some use ADHD-I, ADD and AADD when they describe those who lack hyperactivity and mostly among adults and older adolescents.

During the eighteenth century, Sir Alexander Crichton explained it in his book as the incapacity of having attention with a constant degree to an object. It arose from morbid sensibility of the nerves. It is maybe an inborn or an effect of accidental disease. He observed that there are people who have this kind of condition seem to have restlessness. They are those who walk up and down the room, moves a table excitedly, etc. 

In the 20th century, the father of British pediatrics, Sir George Frederick Still did not use the current terminology for this kind of condition. He was able to described 43 children who have problems with self-regulation and attention. They were often aggressive, insolent and resistant to discipline.

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