Temporal organization of stride-to-stride variations contradicts predictive models for sensorimotor control of footfalls during walking.

ABSTRACT: Walking exhibits stride-to-stride variations. Given ongoing perturbations, these variations critically support continuous adaptations between the goal-directed organism and its surroundings. Here, we report that stride-to-stride variations during self-paced overground walking show cascade-like intermittency-stride intervals become uneven because stride intervals of different sizes interact and do not simply balance each other. Moreover, even when synchronizing footfalls with visual cues with variable timing of presentation, asynchrony in the timings of the cue and footfall shows cascade-like intermittency. This evidence conflicts with theories about the sensorimotor control of walking, according to which internal predictive models correct asynchrony in the timings of the cue and footfall f

SUBMITTER: Mangalam M 

PROVIDER: S-EPMC10449478 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature