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Bimanual coordination dynamics in adults with Down syndrome
Shannon D Robertson Ringenbach1, Romeo Chua, Brian K V Maraj
1Motor Development Laboratory at Arizona State University, Tempe, AZ 85287-0404, USA.
Motor Control
|November 14, 2002
Summary
Adults with Down syndrome (DS) show effective bimanual coordination, performing similarly to typical adults in continuous tasks. However, unimanual tasks reveal hand asymmetries in individuals with DS.
Area of Science:
- Neuroscience
- Motor Control
- Developmental Psychology
Background:
- Individuals with Down syndrome (DS) often exhibit motor deficits, particularly in discrete unimanual tasks.
- Previous research highlights auditory/verbal-motor challenges in DS.
Purpose of the Study:
- To investigate unimanual and bimanual continuous perceptual-motor actions in adults with Down syndrome.
- To compare motor performance in DS with typical adults and children.
Main Methods:
- Ten adults with DS, 10 typical adults, and 10 children drew continuous circles.
- Tasks were performed bimanually and unimanually, paced by visual or auditory metronomes.
- Analysis focused on circle shape, coordination, and hand asymmetries.
Main Results:
- Adults with DS showed higher accuracy with auditory pacing, unlike children and typical adults who preferred visual pacing.
- Unimanual tasks revealed significant hand asymmetries in adults with DS.
- In bimanual tasks, adults with DS demonstrated in-phase coordination and stability comparable to typical adults.
Conclusions:
- Bimanual coordination in adults with Down syndrome appears effective, despite unimanual hand asymmetries.
- Sensory modality preference (auditory vs. visual) differs between adults with DS and typically developing individuals.
- Findings suggest distinct patterns of motor control in DS across unimanual and bimanual continuous tasks.