For many children with cerebral palsy, leg dystonia can make walking difficult and even painful. However, a quick test developed by physician-scientists in the Department of Neurology offers a clearer way to assess dystonia, with the potential to guide more precise care.

More than half of children with cerebral palsy experience these involuntary, often painful muscle contractions that lead to abnormal movement and posture. Yet it has long been difficult to diagnose — and even harder to define.

For decades, diagnosis has relied largely on a subjective and ultimately inconsistent benchmark: the physician’s subjective assessment.

“An overarching goal of this work is about standardizing dystonia assessment by quantifying diagnoses that were previously based on doctors’ gut feelings,” said Bhooma Aravamuthan, MD, DPhil, an assistant professor of neurology. “These results can be immediately put into clinical practice to help guide treatment.”

In a study led by Aravamuthan, children were recorded performing a simple seated task, allowing specialists to track how their legs moved toward the body’s midline, a subtle but reliable marker of dystonia severity.

The team then turned to mice, stimulating specific brain cells involved in motor control to recreate the same movement pattern, offering clues to the underlying biology and a potential target for future treatments.

What they found was a link between the dystonia-like movement patterns and sustained activity in these brain cells.

This objective approach to evaluating dystonia could be used in clinics right away. Now, the test is already helping guide treatment decisions and allowing doctors to track changes in care with more consistency and confidence.

For families navigating cerebral palsy, this new approach to patient care offers something simple but powerful — actual answers for their child.

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