Early, Intensive Therapy Shows Promise for Infants with Cerebral Palsy

Infants and toddlers diagnosed with unilateral cerebral palsy—a condition affecting muscle control on one side of the body—experience significant and lasting improvements in arm and hand function with early, high-dose therapy, according to a new clinical trial led by researchers at Virginia Tech. The findings offer valuable guidance for families and clinicians navigating treatment options during a critical period of brain development.

Understanding the Baby CHAMP Study

The study, known as Baby CHAMP (Children with Hemiparesis Arm-and-Hand Movement Project), directly compared three therapist-delivered interventions: two forms of constraint-induced movement therapy (CIMT) and bimanual therapy. CIMT involves restricting the use of the stronger arm to encourage the use of the weaker one, although bimanual therapy focuses on coordinated use of both hands.

Researchers discovered that children aged 6 to 24 months demonstrated comparable gains regardless of the specific therapy received. Options included full-time casting, a splint worn during therapy sessions, or bimanual training without constraining the stronger arm. The results were published in Pediatrics Open Science.

The Power of Early Intervention

“The brain in the first two years of life is remarkably plastic,” explains Stephanie DeLuca, associate professor at the Fralin Biomedical Research Institute at VTC and co-principal investigator of the trial. “By delivering high-dose, play-based therapy early, we’re capitalizing on a window of opportunity when the nervous system is especially responsive to experience.”

Currently, both CIMT and bimanual therapy are widely recommended for children over two years old with unilateral cerebral palsy. However, limited data previously existed to guide treatment decisions for younger infants and toddlers. This study addresses that gap, providing evidence-based options for families and clinicians.

Study Details and Findings

The randomized controlled trial involved 58 children, with 53 completing treatment and assessments, and 41 participating in a six-month follow-up evaluation. Participants received three hours of therapy daily, five days a week, for four consecutive weeks—totaling 60 hours of structured intervention. Parents likewise engaged in guided home practice with their children.

Across all three therapy groups, children showed significant improvements in their ability to use both hands, both individually and in coordination. Gains were measured using standardized developmental assessments conducted by evaluators unaware of the treatment assignments. Improvements in fine motor skills were also observed in the less-affected arm, with the most pronounced benefits appearing at the six-month follow-up.

Addressing Concerns and Looking Ahead

Researchers initially hypothesized that bimanual therapy would lead to greater improvements in two-handed skills and full-time casting would yield stronger gains in the affected arm. However, the data did not support these predictions, indicating broadly comparable outcomes across all approaches.

The study also investigated concerns that constraining the stronger arm might hinder its development. Contrary to these concerns, no evidence of harm was observed. In fact, children in the full-time cast group demonstrated slightly greater gains in fine motor skills in their non-affected arm at the six-month mark compared to the bimanual group.

“This is important to the field because many people have worried that the use of a constraint might slow the developmental process of the less-affected arm,” DeLuca said. “Our findings confirm that this did not occur and this therapy may even help promote improvements in skills on the less-affected arm and hand.”

While some parents reported short-term frustration with casts or splints, and minor skin irritation occurred in a few cases, no serious adverse effects were attributed to the therapy itself.

Collaborative Research

The trial was a collaborative effort involving researchers from Virginia Tech, The Ohio State University, and Nationwide Children’s Hospital. Therapists received centralized training to deliver structured, play-based interventions based on motor learning principles, including repetition, reinforcement, and progressively challenging activities.

Researchers emphasize the need for longer-term studies to fully understand the lasting impact of early therapy on a child’s overall development.