Poststroke consequences upon optimization properties of postural sway during upright stance: a cross-sectional study.

Autor:	Oliveira FAF; Graduate Program in Rehabilitation Sciences, Centro Universitário Augusto Motta - UNISUAM, Rio de Janeiro, Brazil., Martins CP; Graduate Program in Rehabilitation Sciences, Centro Universitário Augusto Motta - UNISUAM, Rio de Janeiro, Brazil., de Oliveira LAS; Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro - IFRJ, Rio de Janeiro, Brazil., Rodrigues EC; Graduate Program in Rehabilitation Sciences, Centro Universitário Augusto Motta - UNISUAM, Rio de Janeiro, Brazil.; Instituto D'Or de Ensino e Pesquisa - IDOR, Rio de Janeiro, Brazil., Ferreira AS; Graduate Program in Rehabilitation Sciences, Centro Universitário Augusto Motta - UNISUAM, Rio de Janeiro, Brazil., Lemos T; Graduate Program in Rehabilitation Sciences, Centro Universitário Augusto Motta - UNISUAM, Rio de Janeiro, Brazil.
Jazyk:	angličtina
Zdroj:	Topics in stroke rehabilitation [Top Stroke Rehabil] 2023 Oct; Vol. 30 (7), pp. 663-671. Date of Electronic Publication: 2022 Oct 05.
DOI:	10.1080/10749357.2022.2130620
Abstrakt:	Background: The understanding of human postural control has advanced with the introduction of optimization process modeling. These models, however, only provide control parameters, rather than analytical descriptors of optimization processes. Here, we use a newly developed direct (pattern) search algorithm to investigate changes in postural optimization process in poststroke individuals. Objective: This cross-sectional study investigated the optimization properties of postural stability during upright standing in poststroke individuals. Methods: Twenty-nine poststroke and 15 healthy age-matched individuals underwent posturography with a force platform while standing for 60 s for acquisition of center-of-pressure data. Poststroke individuals were grouped depending on their weight-bearing (WB) pattern and their balance capability assessed through Berg Balance Scale (BBS). The optimization properties of postural stability were computed assuming the minimization of postural sway as cost function. Results: The asymmetric WB poststroke group showed larger convergence rate toward the local minimum of postural sway than the symmetric WB group. Additionally, the low-balance capability group exhibited smaller values for averaged local minima and global minimum of postural sway coordinates compared with high-balance capability group. Significant correlations were found for BBS and the local minima and global minimum (Pearson's r ranged 0.378-0.424, P < 0.05). Conclusions: In summary, the optimization properties describing postural dynamic stability, steadiness, and global reference are altered in poststroke individuals with asymmetric WB pattern and low-balance capability.
Databáze:	MEDLINE
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