Quantitative evaluation of gait ataxia by accelerometers

Area of Science:

• Neuroscience
• Biomarker Discovery
• Movement Disorders

Background:

• Spinocerebellar degeneration (SCD) lacks a definitive biomarker.
• Cerebellar ataxia, a key feature of SCD, requires objective assessment tools.

Purpose of the Study:

• To evaluate gait analysis as a neurophysiological biomarker for cerebellar ataxia in SCD patients.
• To identify specific gait parameters correlating with ataxia severity and disease specificity.

Main Methods:

• Gait analysis using triaxial accelerometers on 25 SCD patients, 25 Parkinson's disease patients, and 25 healthy controls.
• Measurement of acceleration signals during walking and standing.
• Extraction of gait parameters: average and coefficient of variation of motion trajectory amplitude.
• Correlation analysis with the Scale for the Assessment and Rating of Ataxia (SARA) and Berg Balance Scale (BBS).

Main Results:

• The average amplitude of medial-lateral motion from the upper back during straight gait emerged as a significant physiological biomarker for cerebellar ataxia.
• Gait parameters demonstrated correlation with SARA scores, indicating severity.
• The identified gait parameter showed disease specificity when compared to Parkinson's disease and healthy controls.

Conclusions:

• Gait analysis provides a quantitative and concise method for evaluating cerebellar ataxia severity in spinocerebellar degeneration.
• Medial-lateral gait amplitude shows promise as a neurophysiological biomarker for cerebellar ataxia.