Le rôle des symptômes d'hyperactivité- impulsivité dans la performance à une tâche de pointage manuel : quel rôle pour l'inattention?
Symptoms linked to ADHD were assessed on 277 twins according to the commonly recognized dimensions formed by hyperactivity-impulsivity and inattention. A semi-structured interview administered to parents was used for the assessment. Subjects were asked to perform a pointing task. Left and right hands were tested in turn, and to reach a target placed either at 135° or 45°. Order of appearance was randomly determined. All traces were categorized according to the first voluntary correction as shown in their kinematic profiles : no correction, position correction, and dynamic correction. This project proposes to characterize the link between each correction type frequency and hyperactivity-impulsivity and inattention symptoms. The population studied was mostly subclinical and did not reach ADHD diagnosis criteria. Position corrections were shown to be correlated quite reliably to hyperactivity- impulsivity symptoms, but not to inattention symptoms. Deficits were most reliably linked with left hand use. The first result was unexpected considering abundant literature confirming the link between inattention and fine motor deficits, but the second one is more in line with a less exploited hypothesis stating that hemispherical functional differentiation related to control of the hand, or control of attention is affected by ADHD.
Inattention inhibition motrice ADHD hyperactivity-impulsivity motor control planification reaching motor inhibition environment