Cortical thumb orthosis for children with spastic hemiplegic cerebral palsy

Area of Science:

• Pediatric Rehabilitation
• Neuroscience
• Orthotics and Prosthetics

Background:

• Spastic hemiplegic cerebral palsy (CP) often results in impaired hand function, characterized by an "indwelling" thumb.
• This thumb positioning hinders effective prehension, impacting daily activities in affected children.

Purpose of the Study:

• To evaluate the efficacy of a newly developed orthosis in controlling thumb position.
• To assess the impact of the orthosis on improving hand function and prehension patterns in children with spastic hemiplegic CP.

Main Methods:

• A clinical evaluation was conducted on five children aged 20-26 months with mild to moderate spastic hemiplegic CP.
• The study assessed the effect of a custom-designed orthosis on thumb position and grasping capabilities.

Main Results:

• The orthosis successfully repositioned the "indwelling" thumb in all five participants.
• A significant improvement in prehension patterns was observed, transitioning from an ulnar "raking" grasp to a functional radial grasp (three-jaw chuck or cylindrical).

Conclusions:

• The developed orthosis is effective in improving thumb positioning and hand function in young children with spastic hemiplegic cerebral palsy.
• Potential mechanisms for improvement include optimized thumb placement, reduced muscle tone, and enhanced sensory-motor feedback leading to successful hand use.