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. 2022 Jun 16;14:904895. doi: 10.3389/fnagi.2022.904895

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Copyright © 2022 Shokouhi, Khodakarami, Fernando, Osborn and Horne.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Panels (A,B) compare the spectral densities (left) and autocorrelation function (right) of a normal walker with low scores for UPDRS III questions for axial rigidity (UPDRS III 3a–3e = 2), postural stability (UPDRS III 3.10-12 = 1), UPDRS III (overall) (=20), and low FoG score (=5). Panels (C,D) compare the spectral densities (left) and autocorrelation function (right) of an abnormal walker with high responses to UPDRS III questions for axial rigidity (UPDRS III 3a–3e = 11) and postural stability (UPDRS III 3.10-12 = 4), UPDRS III (overall) (48), and high FoG score (=11).