Two-handed catching in children with developmental coordination disorder

Area of Science:

• Movement science
• Pediatric motor control
• Developmental coordination disorder research

Background:

• Developmental Coordination Disorder (DCD) affects motor skill acquisition.
• Understanding upper limb coordination is crucial for diagnosing and managing DCD.
• Limb coupling strategies in DCD during functional tasks are not fully understood.

Purpose of the Study:

• To investigate inter and intralimb coupling of upper limbs in children with DCD versus age-matched controls (AMC).
• To analyze kinematic differences during a two-handed ball-catching task.
• To determine how limb coupling strategies relate to task success in DCD.

Main Methods:

• Utilized 3D kinematic and standard video analysis.
• Examined 16 children (8 DCD, 8 AMC) performing 30 two-handed catches each.
• Quantified inter and intralimb linkage and variability.

Main Results:

• AMC children demonstrated higher catch success rates than DCD children (p < .005).
• DCD participants exhibited significantly greater inter and intralimb linkage (p < .01).
• AMC participants showed greater intra-individual variability in limb linkages (p < .01).

Conclusions:

• Both DCD and AMC children use limb coupling for control during ball catching.
• DCD children display a less adaptable motor system with reduced capacity for movement variation.
• This motor inflexibility in DCD contributes to difficulties in successful task execution.