Altered performance on an ocular fixation task in attention-deficit/hyperactivity disorder.
Biol Psychiatry
; 50(8): 633-5, 2001 Oct 15.
Article
em En
| MEDLINE
| ID: mdl-11690600
ABSTRACT
BACKGROUND:
Attention-deficit/hyperactivity disorder (ADHD) is a common psychiatric disorder without validated objective markers. Eye movement studies may be useful in providing objective criteria for characterizing the disorder.METHODS:
We compared 53 children (29 girls) with ADHD to 44 healthy control children (18 girls) on a 21-sec fixation task. Large saccades (> 4 degrees ) away from the fixation point were analyzed.RESULTS:
Children with ADHD made more large saccades that interrupted fixation than did control children (p =.001). Mean scores of the ADHD group did not change significantly with subsequent retesting on placebo (p =.11); however, there was poor intrasubject correlation (r =.16).CONCLUSIONS:
Both boys and girls with ADHD made significantly more intrusive saccades during fixation than did control subjects, possibly reflecting intrinsic neurologic dysfunction; however, a probable "floor effect" obviates conclusions about the reliability of this measure.
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Base de dados:
MEDLINE
Assunto principal:
Transtorno do Deficit de Atenção com Hiperatividade
/
Fixação Ocular
Idioma:
En
Ano de publicação:
2001
Tipo de documento:
Article
País de afiliação:
Estados Unidos