Characterizing postural sway signals by the analysis of zero-crossing patterns

Sergio Picoli, Giorgio Bombo, Edenize S.D. Santos, Pedro P. Deprá and Renio S. Mendes

Physica A: Statistical Mechanics and its Applications, 2022, vol. 596, issue C

Abstract: Center of pressure (COP) signals have been widely used to investigate various aspects of human balance during quiet standing. Here, we compute a set of measures — including burstiness, memory and local variation — to quantify temporal patterns in COP zero-crossings. Specifically, we investigate the effect of stance type (bipedal and unipedal) on the proposed measures. Data were obtained from a group of 20 health and young subjects. The results suggest that these measures are able to detect differences in zero-crossing patterns between bipedal and unipedal stance. We also perform a test–retest reliability analysis for each measure and a pairwise correlation analysis for combinations of measures. Finally, we discuss some potential implications of our results for the study of human balance.

Keywords: Human balance; Zero-crossings; Interevent times; Burstiness; Memory; Local variation (search for similar items in EconPapers)
Date: 2022
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Citations: View citations in EconPapers (1)

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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:596:y:2022:i:c:s0378437122001716

DOI: 10.1016/j.physa.2022.127160

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