Influence of visual information in postural control: Impact of the used stabilometric analysis methods
Abstract
Introduction: This study aimed to investigate the postural control performance and the contribution of the sensorial systems during upright standing posture through an integrated analysis of the center-of-pressure (CoP) oscillations with time and frequency domain methods. Material and Methods: Volunteers remained on upright standing upon a piezoelectric force platform at two conditions: eyes closed (EC) and eyes opened (EO). Coordinates of the body's CoP were analyzed to obtain stabilometric parameters in the time (anteroposterior (AP) and medial-lateral (ML) amplitude displacement of the CoP) and in the frequency domain (contribution of spectral bands sub 0.3Hz and 1-3Hz). The time-domain parameters inform a postural control performance, while the spectral parameters inform sensorial strategies to ensure a satisfactory postural stability. Results: Time-domain parameters were not significantly different between conditions, while the contribution of Sub 0.3Hz band was higher in EO condition, as well as, the contribution of 1-3Hz band was higher in the EC. Discussion: Our results pave the way for further studies using stabilometric parameters in the time and frequency domain together. Using this integrated approach, it was possible to identify a reweighting from the available sensory cues, since the Sub 0.3Hz band depends on the visual and vestibular input, while 1-3Hz band depends on the proprioceptive input, ensuring a good postural stability even with the visual-deprivation.Downloads
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