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Attention-Deficit/Hyperactivity Disorder01:30

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Using Brain Activation (nir-HEG/Q-EEG) and Execution Measures (CPTs) in a ADHD Assessment Protocol
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Prefrontal oxygenation during working memory in ADHD.

Martin Schecklmann1, Marcel Romanos, Franziska Bretscher

  • 1University of Wuerzburg, Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital Wuerzburg, 97080 Wuerzburg, Germany. schecklman_m@klinik.uni-wuerzburg.de

Journal of Psychiatric Research
|January 2, 2010
PubMed
Summary
This summary is machine-generated.

Children with attention-deficit/hyperactivity disorder (ADHD) showed no distinct differences in object (OWM) and spatial working memory (SWM) prefrontal brain activity compared to controls. This study utilized functional near-infrared spectroscopy to investigate working memory in ADHD.

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Area of Science:

  • Neuroscience
  • Developmental Psychology
  • Cognitive Science

Background:

  • Behavioral studies consistently report working memory deficits in children with attention-deficit/hyperactivity disorder (ADHD).
  • Functional brain imaging suggests prefrontal cortex alterations related to working memory in ADHD.
  • It remains unclear if object (OWM) and spatial visual working memory (SWM) are distinctly impaired in ADHD.

Purpose of the Study:

  • To investigate potential distinct impairments in object (OWM) and spatial visual working memory (SWM) in children with ADHD.
  • To utilize multi-channel functional near-infrared spectroscopy (fNIRS) to assess prefrontal brain activity during working memory tasks in children with ADHD.

Main Methods:

  • The study included 19 children with ADHD (combined type, DSM-IV) and 19 age-, sex-, handedness-, and intelligence-matched controls (aged 8-15 years).
  • Participants completed working memory tasks assessing OWM and SWM separately, alongside a control condition (CON).
  • Prefrontal brain activity was measured using fNIRS, monitoring changes in oxygenated hemoglobin concentration.

Main Results:

  • Working memory performance varied significantly across conditions (OWM > SWM > CON), but no performance differences were observed between ADHD and control groups.
  • Cortical prefrontal activation was significantly higher during OWM and SWM tasks compared to the CON condition.
  • No significant differences in prefrontal activation patterns were found between children with ADHD and controls during the working memory tasks.

Conclusions:

  • The study found no evidence of altered prefrontal processing in object (OWM) and spatial visual working memory (SWM) tasks in children with ADHD compared to controls.
  • The findings suggest that previously observed differences in working memory in ADHD may not stem from distinct prefrontal processing alterations in OWM or SWM.
  • Future research should consider developmental trajectories, task-specific discrepancies, and medication effects to better understand brain activity in ADHD working memory investigations.