Figure 2.

Coherence spectra and 95% confidence intervals for each of the standing conditions and their statistical comparisons. (A) Coherence and gain spectra for the pre and post-standing periods. The blue segmented line is the Walking Control condition, and the violet solid line is the Walking Treatment condition. Both before and after walking the coherence and gain spectra for the two conditions are not broadly statistically different. The segmented lines in the upper panels (coherence) are the 95% confidence limits. Coherence lower than these limits were not significantly different than zero. (B) Coherence and gain spectra compared pre and post within the Walking Control and Walking Treatment conditions. The green segmented lines are the pre-standing periods and the red solid lines are the post-standing periods. After walking, coherence decreased regardless of whether participants received stimulation. Gain did not exhibit any broad differences between pre and post. (C) The first column is the pre-standing period for the Seated Control (gray segmented line) compared to the pre-standing period for the Walking Treatment condition (violet solid line). There were no broad significant differences between the two groups at the start. The second column in (C) compares the pre and post-standing periods for the Seated Control condition. No broad significant differences existed between the two standing periods in the Seated Control condition. Each curve n = 15, and the difference in coherence and gain (row 2 and row 4) was evaluated by bootstrapping the difference in means between the two coherence distributions and determining the 95% confidence interval for the difference in mean distribution (gray segmented line surrounding the shaded region). Regions where the 95% confidence interval for the difference in means excluded zero were deemed significantly different and have been indicated with a star.