The Visuo-Motor Attention Test in Boys with Attention Deficit Hyperactivity Disorder (ADHD): Methylphenidate-Placebo
Yaffa Hadar1, Shraga Hocherman2, Oren Lamm3
1Department of Special Education, Faculty of Education, Haifa University, Haifa, Israel. yaffahad@gmail.com.
Insights
Children with Attention-Deficit/Hyperactivity Disorder (ADHD) show impaired visuomotor attention. Methylphenidate (MPH) treatment significantly improved attention test performance, especially in combined/hyperactive subtypes.
Area of Science:
- Neuroscience
- Developmental Psychology
- Pediatrics
Background:
- Attention-Deficit/Hyperactivity Disorder (ADHD) is a common neurodevelopmental disorder characterized by inattention and/or hyperactivity-impulsivity.
- Visuomotor attention, the ability to process visual information and guide motor actions, is often impaired in children with ADHD.
- Methylphenidate (MPH) is a commonly prescribed stimulant medication for ADHD, but its specific effects on visuomotor attention require further investigation.
Purpose of the Study:
- To evaluate visuomotor attention abilities in boys with ADHD compared to typically developing controls.
- To assess the impact of Methylphenidate (MPH) versus placebo on visuomotor attention performance in children with ADHD.
- To investigate potential differences in MPH response among ADHD subtypes.
Main Methods:
- A randomized crossover design was employed with 36 boys diagnosed with ADHD and 36 age-matched controls.
- Participants completed the Visuomotor Attention Test (VMAT) at baseline and after one week of either MPH (immediate-release) or placebo.
- Statistical analyses compared VMAT performance between groups and across conditions.
Main Results:
- Children with ADHD demonstrated significantly poorer performance on several VMAT measures compared to controls at baseline.
- No significant baseline performance differences were found between ADHD subtypes (combined/hyperactive vs. inattentive).
- MPH treatment led to significant improvements in VMAT performance for the ADHD group, particularly for the combined and predominantly hyperactive (C/HI) subtype.
Conclusions:
- Visuomotor attention deficits are a key feature in boys with ADHD.
- The Visuomotor Attention Test (VMAT) is a sensitive tool for measuring attention deficits in ADHD.
- MPH treatment effectively enhances visuomotor attention in children with ADHD, with notable benefits for the C/HI subtype, suggesting its utility in treatment assessment.
Abstract:
To assess the visuomotor attention ability in children with ADHD and controls and their response to placebo and Methylphenidate (MPH) treatment. 36 boys with ADHD and 36 age matched typical controls were administered the visuomotor attention test (VMAT) as a baseline and following a week of MPH(IR) or placebo administered to the study group, in a randomized crossover design. A significant difference between the study and control groups was found on several VMAT measures. No performance difference between ADHD dimensional sub-types was observed at the baseline assessment. Under MPH treatment a significant improvement in VMAT measures was observed and particularly in the combined and predominantly hyperactive (C\HI) type. The VMAT results obtained in the present study are consistent with previous findings. ADHD subtypes appear similarly short of visuomotor attention resources; a visuomotor test can be used in the assessment of gains derived from MPH treatment.
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