Upper limb functional assessment of children with cerebral palsy using a sorting box

Area of Science:

• Pediatric Neurology
• Rehabilitation Medicine
• Biomechanical Engineering

Background:

• Cerebral palsy (CP) significantly impacts motor function, particularly in the upper limbs.
• Quantitative assessment of upper limb motor function is crucial for effective diagnosis and rehabilitation in children with CP.
• Existing assessment methods may lack the sensitivity to capture subtle motor control differences.

Purpose of the Study:

• To evaluate the utility of a sorting box task for quantitative assessment of upper limb motor function in children with cerebral palsy.
• To determine if movement smoothness metrics can differentiate between children with and without CP.
• To quantify motor function differences between affected and less-affected sides in hemiparetic CP.

Main Methods:

• Children with and without CP performed a sorting box task involving placing and removing geometrical objects.
• A camera-based, motion-tracking system monitored wrist position during the task.
• Analysis included smoothness metrics (logarithmic dimensionless jerk, spectral arc-length, number of peaks) and time to task completion.

Main Results:

• Smoothness metrics effectively distinguished between children with and without cerebral palsy.
• These metrics also quantified motor function differences between the affected and less-affected upper limbs in hemiparetic CP.
• Time to task completion showed potential but smoothness metrics offered more sensitive discrimination.

Conclusions:

• Movement smoothness metrics derived from a sorting box task provide a quantitative and sensitive measure of upper limb motor function in children with cerebral palsy.
• These metrics can aid in distinguishing individuals with CP and assessing asymmetry in hemiparetic CP.
• The sorting box task combined with motion tracking offers a promising tool for objective motor function assessment in pediatric neurorehabilitation.