Structural neuroplastic change after constraint-induced movement therapy in children with cerebral palsy

Area of Science:

• Neuroscience
• Pediatric Neurology
• Rehabilitation Medicine

Background:

• Constraint-Induced Movement (CI) therapy has shown structural neuroplastic changes correlating with clinical improvements in adult stroke patients.
• The efficacy of CI therapy in inducing similar brain changes in children with congenital hemiparesis remains to be fully elucidated.

Purpose of the Study:

• To evaluate if CI therapy induces comparable structural neuroplastic changes in children with congenital hemiparesis.
• To assess the correlation between gray matter changes and motor improvements following CI therapy in pediatric patients.

Main Methods:

• Ten children with congenital hemiparesis underwent MRI scans at three time points: 3 weeks before, immediately before, and immediately after a 3-week CI therapy intervention.
• Longitudinal voxel-based morphometry was used to analyze changes in gray matter volume.
• The Pediatric Motor Activity Log-Revised assessed changes in affected arm use before and after treatment.

Main Results:

• Children demonstrated significant improvements in spontaneous use of the more-affected arm post-CI therapy (P < .001).
• A significant increase in gray matter volume was observed in the sensorimotor cortex contralateral to the more-affected arm (P = .04).
• Trends indicated correlations between gray matter changes and motor improvements, alongside increases in ipsilateral motor cortex and contralateral hippocampus gray matter volume.

Conclusions:

• CI therapy promotes gray matter increases in the developing brain of children with congenital hemiparesis.
• These findings provide evidence that CI therapy is associated with structural brain remodeling and motor improvements in pediatric patients with central nervous system disorders.