Influence of feet position on COP measures in post-stroke patients in quiet standing.

Autor: Boumer TC; Pontifícia Universidade Católica do Paraná, Health Technology Graduate Program, Rua Imaculada Conceição, 1155, Curitiba, 80215-901, Brazil. Electronic address: tatianeboumer@gmail.com., Martello SK; Pontifícia Universidade Católica do Paraná, Health Technology Graduate Program, Rua Imaculada Conceição, 1155, Curitiba, 80215-901, Brazil. Electronic address: susiketlyn@hotmail.com., Devetak GF; Pontifícia Universidade Católica do Paraná, Health Technology Graduate Program, Rua Imaculada Conceição, 1155, Curitiba, 80215-901, Brazil. Electronic address: gidevetak@hotmail.com., Iucksch DD; Universidade Federal do Paraná, Physical Education Graduate Program, Avenida Prefeito Lothario Massner, 632, Curitiba, 80210-170, Brazil. Electronic address: dielise@gmail.com., Scrok ND; Pontifícia Universidade Católica do Paraná, Health Technology Graduate Program, Rua Imaculada Conceição, 1155, Curitiba, 80215-901, Brazil. Electronic address: niscrok@hotmail.com., Manffra EF; Pontifícia Universidade Católica do Paraná, Health Technology Graduate Program, Rua Imaculada Conceição, 1155, Curitiba, 80215-901, Brazil. Electronic address: elisangela.manffra@pucpr.br.
Jazyk: angličtina
Zdroj: Gait & posture [Gait Posture] 2018 Oct; Vol. 66, pp. 58-62. Date of Electronic Publication: 2018 Aug 09.
DOI: 10.1016/j.gaitpost.2018.07.182
Abstrakt: Background: Foot placement is an important methodological parameter in experiments for analyzing the behavior of the center of pressure (CoP) duringquiet standing. In the case of stroke patients, this is a relevant issue, as the standardized position, usually adopted is not ecological.
Reseach Question: Do between-limb synchronization, weight-bearing symmetry, and amplitude of the postural sway of post-stroke individuals differ between standardized and comfortable foot positions during quiet standing?
Methods: A total of 36 volunteers (20 with stroke and 16 healthy) stood barefoot, for 60 s, on two force plates with feet in a comfortable and standardized position (14° of external rotation and heels 17 cm apart). Three trials were performed in each position, and the average values obtained were analyzed.
Results: The comfortable position adopted by stroke individuals was characterized by heels kept 17 cm apart and with 21° of external rotation. None of the measures of the healthy group were influenced by feet position. In the stroke group, the lag to maximal between-feet correlation in the mediolateral direction (ML ρ max lag) was higher (0.45 s) and the weight-bearing symmetry was better in the comfortable (38%) than in the standardized conditions (0.19 s and 32%, respectively). Neither the other CoP measures nor the intra-subject variability was sensitive to feet position.
Significance: The assumption that standardization leads to reduced variability might not be valid to the post-stroke and healthy individuals age around 55 years. Therefore, adoption of a comfortable condition might be advantageous, once it allows for a more practical and realistic evaluation of postural control.
(Copyright © 2018 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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