Author ORCID Identifier
Mangalam - https://orcid.org/0000-0001-6369-0414
Stergiou - https://orcid.org/0000-0002-9737-9939
Document Type
Article
Publication Date
8-24-2023
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 from one stride to the next on crossing thresholds leading to the risk of falling. Hence, models of the sensorimotor control of walking must account for stride-to-stride variations beyond the constraints of threshold-dependent predictive internal models.
DOI
https://doi.org/10.1371/journal.pone.0290324
Journal Title
PLOS One
Volume
18
Recommended Citation
Mangalam, Madhur; Kelty-Stephen, Damian G.; Sommerfeld, Joel H.; Stergiou, Nicholas; and Likens, Aaron, "Temporal organization of stride-to-stride variations contradicts predictive models for sensorimotor control of footfalls during walking" (2023). Journal Articles. 372.
https://digitalcommons.unomaha.edu/biomechanicsarticles/372
Creative Commons License
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Comments
This is an open access article license under the Creative Commons Attribution license.
https://doi.org/10.1371/journal.pone.0290324