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Related Experiment Videos

Attention-deficit hyperactivity disorder and the stress response

J A King1, R A Barkley, S Barrett

  • 1Department of Psychiatry, University of Massachusetts Medical School, Worcester 01655, USA.

Biological Psychiatry
|July 1, 1998
PubMed
Summary

Children with persistent attention-deficit hyperactivity disorder (ADHD) show a blunted hypothalamic-pituitary-adrenal (HPA) axis response to stress. This impaired stress response may indicate a more enduring form of ADHD.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Endocrinology

Background:

  • Attention-deficit hyperactivity disorder (ADHD) is characterized by impulsivity, inattention, and hyperactivity.
  • A proposed central deficit in ADHD involves poor response inhibition.
  • This study investigates the hypothalamic-pituitary-adrenal (HPA) axis function under mental stress in aggressive ADHD subjects.

Purpose of the Study:

  • To examine the HPA axis's response to mental stress in aggressive ADHD subjects.
  • To compare stress response between ADHD subjects with persistent and transient diagnoses.
  • To identify potential biomarkers for persistent ADHD.

Main Methods:

  • Collected morning salivary samples for cortisol measurement at pretest and posttest.

Related Experiment Videos

  • Administered a battery of tests to induce mental stress.
  • Longitudinal study design tracking ADHD diagnosis over one year.

    • Main Results:

    • ADHD subjects maintaining their diagnosis after one year exhibited a blunted cortisol response to stress.
    • Subjects who no longer met ADHD criteria after one year showed a more robust stress response.
    • A diminished HPA axis response to stress was observed in the persistent ADHD group.

    Conclusions:

    • An impaired response to stress may serve as a marker for the persistent form of ADHD.
    • The findings suggest a link between HPA axis dysregulation and the long-term course of ADHD.
    • Further research is warranted to explore the HPA axis's role in ADHD persistence.