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Related Experiment Videos

Hand preference in attention deficit hyperactivity disorder.

Helmut Niederhofer1

  • 1General Hospital of Bolzano, Department of Pediatrics, Via L.-Boehler 5, I-39100 Bolzano, Italy. helmutniederhofer@yahoo.de

Perceptual and Motor Skills
|February 24, 2006
PubMed
Summary

Children with Attention Deficit Hyperactivity Disorder (ADHD) show a stronger preference for left-hand use in functional tasks. This suggests potential differences in cerebral control compared to neurotypical children.

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Area of Science:

  • Neurodevelopmental Disorders
  • Human Motor Control
  • Child Psychology

Background:

  • Attention Deficit Hyperactivity Disorder (ADHD) is a common neurodevelopmental disorder.
  • Hand preference and its relation to cerebral function are areas of ongoing research.
  • Understanding atypical motor control in ADHD can inform diagnostic and therapeutic approaches.

Purpose of the Study:

  • To investigate hand use patterns in children diagnosed with ADHD.
  • To compare hand preference in ADHD subjects with a control group.
  • To explore the relationship between task complexity, task type (internal/external), and hand preference in ADHD.

Main Methods:

  • Study involved 56 subjects (aged 5-16 years) diagnosed with ADHD.
  • Parental reports were used to assess hand use in various functional tasks.

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  • Hand preference was analyzed in relation to task complexity (simple vs. complex) and task type (internal vs. external).

    • Main Results:

    • A marked preference for left-hand use was observed in the ADHD group compared to controls.
    • Left-hand preference was more pronounced for complex tasks than simple tasks.
    • External tasks (e.g., handling objects) showed a greater left-hand preference than internal tasks (e.g., self-touching).
    • The extent of laterality was greater for complex than simple external tasks and for external than internal tasks.

    Conclusions:

    • Findings suggest a potential deficit in the cerebral control of right-hand use among individuals with ADHD.
    • The observed hand preference patterns may indicate atypical neurodevelopmental pathways affecting motor control.
    • Further research is warranted to elucidate the neurobiological underpinnings of these motor differences in ADHD.