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. 2017 Apr 12;9:96. doi: 10.3389/fnagi.2017.00096

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Copyright © 2017 Huang, Lin and Hwang.

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) or licensor 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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The adjacent matrix of t-values that contrasts SL between the level-surface and stabilometer conditions for the young and older groups (upper plot). The adjacent matrix of t-values clearly shows a different trend of stance-related modulation of SL across all electrode pairs for the young and older groups, (t > 1.771: stabilometer SL > level-surface SL, p < 0.05; t < −1.771: level-surface SL > stabilometer SL, p < 0.05). The lower plots display the results of connectivity analysis with network-based statistics (threshold value = 0.3). A contrasting wiring diagram shows topological distributions of the suprathreshold connectivity that vary with stance difficulty increase for the young and older groups. Red line: stabilometer connectivity of supra-threshold > level-surface connectivity of supra-threshold, p < 0.005; blue line: level-surface connectivity of supra-threshold > stabilometer connectivity of supra-threshold, p < 0.005.