[Attention and the executive functions].
OBJECTIVE
The objective of this study was to determine the relations that exist between attention and the executive functions, and between attention deficit hyperactivity disorder (ADHD) and dysexecutive syndrome, while at the same offering a definition of these terms. To achieve this, several aspects related to attention and the executive functions are reviewed, including the evolution of the concept, the different types and the anatomical location.


METHODS
The analysis investigates the possible relations between attention and the executive functions, and the modifications that have taken place in ADHD over time, which leads us to consider whether it is the children themselves and the factors that may have influenced these differences. The work then moves on to analyse the possible explanation behind the most frequent symptoms: attention deficit, hyperactivity and impulsiveness, and more especially whether they can be symptoms of executive dysfunction. The possibility of several clinical forms then arises. Finally, we accept the possible cause as being due to an alteration in neurotransmitters, especially dopamine and noradrenalin. A discussion is also included on whether the new interpretation, executive dysfunction, entails a different treatment and whether this offers some benefit for the child.


CONCLUSIONS
Attention is related to the executive functions, but it is not one of them. ADHD has several clinical forms, one of which (although not the only one) may be dysexecutive syndrome. The clinical symptoms may be caused by a delay in the development of distinct neurotransmitter systems.
Instituto Universitario CEDIIAP, Montevideo, Uruguay. cediap@adinet.com.uy
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Montiel
D001288:Attention / Q000502:physiology*; D001289:Attention Deficit Disorder with Hyperactivity / Q000503:physiopathology; D001921:Brain / Q000502:physiology*; D002648:Child; D006801:Humans