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Valentina Agostini, Emma Chiaramello and Marco Knaflitz

Static posturography provides an objective assessment of postural control by characterizing the body sway during upright standing. The center of pressure (COP) signal is recorded by a force platform, and it is analyzed by means of many different models and techniques. Most of the parameters calculated according to these different approaches are affected by relevant intra- and intersubject variability or do not have a clear physiological interpretation. Traditional approaches decompose the COP signal into anteroposterior and mediolateral time series, corresponding to ankle plantar/dorsiflexion and hip adduction/abduction, respectively. In this study we hypothesized that COP signals show inherent rotational characteristics. To verify our hypothesis we applied the rotary spectra analysis to the two-dimensional COP signal to decompose it into clockwise and counterclockwise rotational components. We demonstrated the presence of rotational components in the COP signal of healthy subjects, providing a reference data set of the spectral characteristics of these components.

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Daniel G. Miner, Brent A. Harper and Stephen M. Glass

(HS-SOT). The outcome variables of these 2 systems demonstrated large ranges for 95% LOA, indicating that these systems should not be used interchangeably. The most significant difference between these 2 systems is likely related to differences in static posturography compared with dynamic

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Vincent Shieh, Ashwini Sansare, Minal Jain, Thomas Bulea, Martina Mancini and Cris Zampieri

, M. , Micarelli , A. , Viziano , A. , Pavone , I. , Costantini , G. , Casali , D. , & Saggio , G. ( 2017 ). Body-worn triaxial accelerometer coherence and reliability related to static posturography in unilateral vestibular failure . Acta Otorhinolaryngologica Italica, 37 ( 3 ), 231

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Michelle R. Tanel, Tyler B. Weaver and Andrew C. Laing

. Howcroft J , Lemaire ED , Kofman J , McIlroy WE . Elderly fall risk prediction using static posturography . PLoS ONE . 2017 ; 12 ( 2 ): e0172398 . PubMed ID: 28222191 doi:10.1371/journal.pone.0172398 28222191 10.1371/journal.pone.0172398 12. Holliday PJ , Fernie GR , Gryfe CI