Fig. 1: Overview of population and dataset.

A Participant clinical and demographic data with range of values provided in parentheses. B Filtering steps for inclusion of sessions and participants used in cross-sectional and longitudinal analysis. C Visualization of each participant’s session time points for data collection from 2014 to 2022, along with the movement features extracted from each session. ALSFRS ALS Functional Rating Scale-Revised, d day, h hour, Lt left, Rt right.