Determinants of Gait Dystonia Severity in Cerebral Palsy

Overview

Journal Dev Med Child Neurol

Date 2023 Jan 26

PMID 36701240

Authors

Bhooma R Aravamuthan

Toni S Pearson

Keisuke Ueda

Hanyang Miao

Gazelle Zerafati-Jahromi

Laura Gilbert

Cynthia Comella

Joel S Perlmutter

Affiliations

Soon will be listed here.

Abstract

Aim: To determine the movement features governing expert assessment of gait dystonia severity in individuals with cerebral palsy (CP).

Method: In this prospective cohort study, three movement disorder neurologists graded lower extremity dystonia severity in gait videos of individuals with CP using a 10-point Likert-like scale. Using conventional content analysis, we determined the features experts cited when grading dystonia severity. Then, using open-source pose estimation techniques, we determined gait variable analogs of these expert-cited features correlating with their assessments of dystonia severity.

Results: Experts assessed videos from 116 participants (46 with dystonia aged 15 years [SD 3] and 70 without dystonia aged 15 years [SD 2], both groups ranging 10-20 years old and 50% male). Variable limb adduction was most commonly cited by experts when identifying dystonia, comprising 60% of expert statements. Effect on gait (regularity, stability, trajectory, speed) and dystonia amplitude were common features experts used to determine dystonia severity, comprising 19% and 13% of statements respectively. Gait variables assessing adduction variability and amplitude (inter-ankle distance variance and foot adduction amplitude) were significantly correlated with expert assessment of dystonia severity (multiple linear regression, p < 0.001).

Interpretation: Adduction variability and amplitude are quantifiable gait features that correlate with expert-determined gait dystonia severity in individuals with CP. Consideration of these features could help optimize and standardize the clinical assessment of gait dystonia severity in individuals with CP.

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