Testing predictive control of movement in children with developmental coordination disorder using converging
Imke L J Adams1, Jessica M Lust1, Peter H Wilson2
1Behavioural Science Institute, Radboud University Nijmegen, The Netherlands.
British Journal of Psychology (London, England : 1953)
|February 11, 2016
Summary
Children with developmental coordination disorder (DCD) show internal modelling deficits in motor imagery and action planning. However, rapid online control remains unaffected, suggesting task-specific challenges in DCD.
Area of Science:
- Neuroscience
- Developmental Psychology
- Motor Control
Background:
- Systematic reviews suggest internal modelling deficits underlie developmental coordination disorder (DCD).
- Previous research has not rigorously tested this hypothesis with a within-subject design across various motor tasks.
Purpose of the Study:
- To investigate internal modelling deficits in children with DCD.
- To assess motor imagery, action planning, and rapid online control (ROC) in DCD.
- To determine if internal modelling deficits vary with task constraints in DCD.
Main Methods:
- A within-subject design was used with 33 children with DCD and 33 age/gender-matched controls (aged 6-11 years).
- Motor imagery was assessed using the hand rotation task (HRT).
- Action planning was evaluated with an end-state comfort effect test, and ROC with a double-step pointing task.
Main Results:
- Children with DCD were significantly slower and less accurate on the HRT compared to controls.
- DCD group exhibited reduced forward planning for a comfortable end-state.
- No significant group differences were observed in the ROC task.
Conclusions:
- Children with DCD demonstrate internal modelling deficits, particularly in motor imagery and action planning.
- These deficits appear to be modulated by task complexity and constraints.
- Rapid online control is less affected, indicating specific areas of difficulty within internal modelling for DCD.
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