Postural sway frequency analysis during the manipulation of somatosensorial, vestibular and visual systems
| Autor: | Soares, Juliana Corrêa |
|---|---|
| Přispěvatelé: | Silveira, Aron Ferreira da, Callegaro, Carine Cristina, Corazza, Sara Terezinha, Lara, Simone, Guadagnin, Eliane Celina |
| Jazyk: | portugalština |
| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Biblioteca Digital de Teses e Dissertações do UFSM Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
| Popis: | The maintenance of postural balance occurs through the performance of the postural control system and any impairment of this system can give rise to body imbalance. Frequency analysis has been widely used in the assessment of postural control. The aim of the study was to evaluate postural sway during manipulation of sensory systems in healthy individuals, comparing the sexes and postural sway in relation to the time of collection. This is an experimental cross-sectional study. The sample consisted of 48 individuals, 23 males and 25 females, with a mean age of 32.21±10.48 years and a BMI of 22.07±3.05 kg/m², exposed to four tests of Sensory Organization (TOS): eyes open, eyes closed, stable and unstable surface, on a force platform. Three trials of 60 seconds were performed, with a one-minute rest interval between them. Acquisition frequency of 100 Hz and data filtered by a 2nd order Butterworth digital filter, adjusted frequency of 20 Hz, and processed through a Matlab routine. The variables used were the displacement amplitude and the medians of the frequencies present in the center of pressure (COP) signals in the anteroposterior and mediolateral directions. For the comparison between the four test conditions, ANOVA of repeated measures and Bonferroni's post hoc was used. For the comparison between the sexes and the comparison between the times (0 - 15s; 16 - 30s; 31 - 50s) during the four test conditions a two-way ANOVA was used. 5% significance level. All analyzes were performed using SPSS version 20.0. The displacement variables and the COP oscillation frequencies were influenced by the manipulation of the sensory systems. The change from stable to unstable surface generated an increase in the frequency of oscillation to maintain postural control (p |
| Databáze: | OpenAIRE |
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