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Updated: Jun 24, 2025

Using Brain Activation nir-HEG/Q-EEG and Execution Measures CPTs in a ADHD Assessment Protocol
Published on: April 1, 2018
[Symptoms and Pathogenesis of ADHD]
1Medical Institute of Developmental Disabilities Research Showa University.
Adult ADHD diagnosis is rising, with symptoms varying by development and environment. Comorbid conditions significantly impact adult ADHD presentation, highlighting the need for biological subcategorization.
Area of Science:
- Neuroscience
- Psychiatry
- Developmental Psychology
Background:
- Adult Attention-Deficit/Hyperactivity Disorder (ADHD) diagnosis is rapidly increasing in Japan.
- ADHD symptoms exist on a continuum with normal development and fluctuate with growth and environment.
- Comorbid psychiatric disorders often influence the presentation of adult ADHD.
Purpose of the Study:
- To address the increasing diagnosis of adult ADHD.
- To understand the influence of developmental processes and environmental factors on ADHD symptoms.
- To explore the impact of comorbid disorders on ADHD characteristics.
- To investigate the heterogeneous biological background of ADHD.
Main Methods:
- Utilizing the Research Domain Criteria (RDoC) approach to investigate pathogenesis and etiology.
- Analyzing the diverse clinical manifestations of ADHD.
- Examining the influence of comorbid psychiatric disorders on ADHD presentation.
Main Results:
- ADHD symptoms are part of a developmental continuum and are influenced by environmental factors.
- Comorbidities significantly alter the clinical picture of adult ADHD.
- ADHD exhibits diverse clinical presentations and a heterogeneous biological basis.
Conclusions:
- The study underscores the complexity of adult ADHD, influenced by development, environment, and comorbidities.
- Further research using approaches like RDoC is crucial for understanding ADHD's biological underpinnings.
- Classifying ADHD into biologically homogeneous subgroups is a future research direction.
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