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. 2022 May 4;13:726677. doi: 10.3389/fphys.2022.726677

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Copyright © 2022 Ogata, Hashiguchi, Hori, Hirobe, Ono, Sawada, Inaba, Orimo and Miyake.

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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Scatter plot of the first two principal components extracted from subjects’ spatial gait features. The first and second component magnitudes represent the displacements of the foot trajectories in the forward and vertical directions, respectively. Healthy young individuals tended to have a larger first principal component than other subjects. The first principal component of mild PD patients and healthy older individuals is larger than that of advanced PD patients. The second principal component of healthy older individuals tends to be smaller than that of the other subjects.