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Impaired motor inhibition in developmental coordination disorder
J L He1, I Fuelscher1, J Coxon2
1Cognitive Neuroscience Unit, School of Psychology, Deakin University, Geelong, Australia.
Brain and Cognition
|September 25, 2018
Summary
Young adults with developmental coordination disorder (DCD) struggle with motor inhibition, showing deficits in both action restraint and action cancellation. These findings support the inhibitory deficit hypothesis of DCD.
Area of Science:
- Neuroscience
- Developmental Psychology
- Motor Control
Background:
- Developmental Coordination Disorder (DCD) is a neurodevelopmental condition affecting motor skills.
- The 'inhibitory deficit' hypothesis proposes that DCD is characterized by difficulties in motor inhibition.
- Existing research presents mixed findings regarding inhibitory control in DCD.
Purpose of the Study:
- To investigate the inhibitory deficit hypothesis of DCD.
- To examine two key components of motor inhibition: action restraint and action cancellation.
- To clarify the role of motor inhibition in young adults with DCD.
Main Methods:
- Utilized carefully designed 'Go/No-go' and 'Stop-signal' tasks to assess action restraint and action cancellation, respectively.
- Recruited 11 young adults with DCD and 11 age-matched typically developing controls.
- Compared performance on motor inhibition tasks between the DCD and control groups.
Main Results:
- Individuals with DCD demonstrated significantly reduced efficiency in action restraint on the 'Go/No-go' task.
- A trend towards longer stop-signal reaction times was observed in the DCD group on the 'Stop-signal' task.
- These results indicate broader difficulties with inhibitory mechanisms in motor behavior for individuals with DCD.
Conclusions:
- The findings support the inhibitory deficit hypothesis of DCD.
- Young adults with DCD exhibit impairments in both action restraint and action cancellation.
- This study provides novel insights into motor inhibition deficits in DCD.
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