Caregiver Differentiation Between Dystonia and Spasticity in Cerebral Palsy.

BACKGROUND: Dystonia is a debilitating movement disorder that is difficult to assess when coexisting with spasticity, as is typical in cerebral palsy (CP). Querying caregivers about their children's movements is known to increase clinical dystonia identification. However, beyond identification, determining whether dystonia is the predominant versus accompanying movement feature in a child with CP can guide clinical decision making, particularly regarding surgical candidacy. We sought to dtermine whether caregivers' movement descriptions differed between children with predominant dystonia, predominant spasticity with accompanying dystonia, and predominant spasticity without dystonia. METHODS: In this cross-sectional study, we used conventional content analysis to codify caregivers' descriptions of triggered involuntary movements in children with CP seen in a tertiary care CP Center between April 2023 and December 2024. Movement feature frequencies were compared across tone types using Chi-square tests with Bonferroni corrections for multiple comparisons. RESULTS: Of 180 children with CP (mean age 9.2 years, 47.8% male), caregivers of children with predominant dystonia (50/180, 27.8%) more frequently described movements triggered by negative emotions (P < 0.002) and affecting their back, trunk, and whole body (P < 0.04). Caregivers of children with predominant spasticity with dystonia (99/180, 55.0%) more frequently described movements affecting a single limb (P < 0.04). Caregivers of children without dystonia (31/180, 17.2%) described movements as being slight or small (P < 0.008). These differences persisted even for caregivers unaware their child had dystonia (77/149, 51.6%). CONCLUSIONS: Caregivers' movement descriptions differ between children with different combinations of dystonia and spasticity, which may help inform clinical management and guide communication with families about dystonia.