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Stimulus context and motor preparation in attention-deficit/hyperactivity disorder
T Banaschewski1, J Yordanova, V Kolev
1Child and Adolescent Psychiatry, University of Göttingen, von-Siebold-Str. 5, 37075 Göttingen, Germany. tobias.banaschewski@zi-mannheim.de
Insights
Stimulus context affects motor preparation in children. Attention-deficit/hyperactivity disorder (ADHD) children show disrupted behavioral regulation and motor control compared to healthy peers.
Area of Science:
- Neuroscience
- Developmental Psychology
- Cognitive Psychology
Background:
- Understanding how environmental context influences behavior and motor control is crucial in child development.
- Attention-deficit/hyperactivity disorder (ADHD) is associated with challenges in executive functions and motor regulation.
Purpose of the Study:
- To examine the impact of local stimulus context variations on behavioral and motor preparation in children.
- To compare these effects between healthy children and children with ADHD (aged 9-12 years).
Main Methods:
- Utilized a cued continuous performance task (AX-CPT) with varying stimulus contexts (Go, NoGo, neutral).
- Recorded behavioral parameters and contingent negative variation (CNV) at cortical motor electrodes.
- Analyzed differences in motor preparation and behavioral responses between groups.
Main Results:
- All children exhibited slowed responses in Go and NoGo conditions compared to neutral.
- Stimulus context differentially affected motor preparation in both healthy children and those with ADHD.
- Children with ADHD demonstrated smaller CNV potentials and aberrant ipsilateral motor area activation.
Conclusions:
- Local stimulus context significantly influences behavioral and motor preparation in children.
- In ADHD, context variations may impair behavior due to dysregulation in higher control systems.
- Findings highlight the role of context in understanding ADHD-related behavioral and motor deficits.
Aim:
To investigate (1) whether and how local stimulus context variation may modify behavioural and preparatory motor processes in children, and (2) if these effects differ between healthy children and children with attention-deficit/hyperactivity disorder (ADHD) aged 9-12 years.
Methods:
Behavioural parameters and contingent negative variation (CNV) at cortical motor electrodes were recorded during a cued continuous performance task (AX-CPT) in three stimulus context conditions (Go, NoGo, neutral). Stimulus context was varied on the basis of stimulus types preceding the cue letter A.
Results:
In all children, responses were slowed in both the NoGo- and Go-conditions relative to the neutral condition. Stimulus context affected preparatory motor processes in both groups but differentially. ADHD children showed smaller CNV potentials and a functionally irrelevant over-activation of the ipsilateral motor area.
Conclusions:
Local stimulus context may modify behavioural and preparatory motor processes in children. In ADHD, local context variations may disrupt behaviour due to inefficient regulation of supervisory higher control systems.
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