Vestibulo-Oculomotor Reflex Dysfunction in Children with Cerebral Palsy Correlates with Gross Motor Function Classification System.

Background/objectives: This study aims to evaluate the feasibility of the angular vestibulo-ocular reflex (aVOR) function assessment in children with cerebral palsy (CP) using the video Head Impulse Test (vHIT) and to investigate how vestibular impairments correlate with functional motor ability.

Methods: This cross-sectional study included children diagnosed with CP who attempted a vestibular function assessment with the vHIT. Descriptive statistics and a subgroup analysis based on clinical expression were performed. Finally, the correlation between aVOR gain and functional motor ability was investigated.

Results: Thirteen children underwent assessments of the horizontal semicircular canals. Six out of thirteen children presented at least one dysfunctional canal; overall, eight out of twenty-six horizontal semicircular canals were dysfunctional in the HIMP paradigm. A subgroup analysis revealed a dysfunctional aVOR gain in all the children presenting ataxia. The correlation analysis demonstrated a strong negative association between aVOR gain and the Gross Motor Function Classification System (-0.73 and -0.68 for the left and right horizontal canal, respectively; p < 0.05).

Conclusions: Vestibular dysfunctions are prevalent in children with CP and strongly correlate with motor function. An instrumental vestibular assessment in children with cognitive-motor disability seems feasible, in particular for horizontal canals and the HIMP paradigm. This could be important for better framing a child's function and enhancing the management of balance and motor impairments with more specific strategies for children with CP.