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. 2018 Nov 27;9:1680. doi: 10.3389/fphys.2018.01680

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Copyright © 2018 Ozdemir, Goel, Reschke, Wood and Paloski.

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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(A) Comparison of postural control performance as (100 – iTTB) % in controls and astronauts on the return day (R+0) for the two head and the two support surface tilt conditions. (B) Somatosensory index (SI) for the two support surface conditions for control subjects. (C) SI for control and astronaut subjects in SOT-2 condition on R+0. (D) Somatosensory reweighing (SRwI) index for control and astronaut subjects. (E) Vestibular index (VI) for the two types of head conditions for control subjects. (F) VI for control and astronaut subjects in the HD condition. (G) The somatosensory change index (SCI) for SOT-2 and the vestibular change index (VCI) for HD. The color shading in bars (B–G) is based on colors used to represent raw data in (A). ^∗p < 0.05.