Spatiotemporal modulation of a common set of muscle synergies during unpredictable and predictable gait perturbations in older adults.

ABSTRACT: Muscle synergies as functional low-dimensional building blocks of the neuromotor system regulate the activation patterns of muscle groups in a modular structure during locomotion. The purpose of the current study was to explore how older adults organize locomotor muscle synergies to counteract unpredictable and predictable gait perturbations during the perturbed steps and the recovery steps. Sixty-three healthy older adults (71.2±5.2 years) participated in the study. Mediolateral and anteroposterior unpredictable and predictable perturbations during walking were introduced using a treadmill. Muscle synergies were extracted from the electromyographic activity of 13 lower limb muscles using Gaussian non-negative matrix factorization. The four basic synergies responsible for unperturbed walki

SUBMITTER: Brull L 

PROVIDER: S-EPMC11058090 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature