Developmental skills of children with spastic diplegia: functional and qualitative changes after selective dorsal rhizotomy.

OBJECTIVE: This study examined changes in muscle tone, passive range of motion, stability, and mobility in developmental skills at 6 months and 1 year after selective dorsal rhizotomy (SDR).

DESIGN: Prospective outcome study of a consecutive sample.

SETTING: Private children's hospital.

PATIENTS: Twenty-six children with spastic diplegia: 13 independent and 13 dependent ambulators (assistive devices).

RESULTS: A decrease in spasticity was seen at 6 months after SDR, with no further decrease at 1 year. Increases in passive range of motion of the hip and ankle were seen at 6 months after SDR. The ability to assume and maintain developmental positions with improved alignment and stability was seen more frequently at 6 months after SDR, whereas an improvement in the ability to perform transitional movements was seen more frequently at 1 year after SDR.

CONCLUSION: SDR decreases spasticity and increases lower extremity range of motion in children with spastic diplegia and appears to be associated with the ability to assume a greater variety of developmental positions with improved alignment, thus greater stability. Improvements in the ability to perform difficult transitional movements at 1 year after SDR are most likely the result of the combined effect of maturation, SDR, and intensive therapeutic intervention.