Resting-state ImCoh at beta frequency bands across tACS and sham sessions compared pre- to post-tACS. The half-violins represent the data distribution of ImCoh at each assessment time point for each session. The width of each violin indicates the density of ImCoh values. The boxplots show the median and interquartile range to visually summarize central tendency and dispersion. The horizontal line within the box plot represents the median. The top and bottom lines represent the upper and lower quartiles, respectively. The data points outside of the whiskers are >1.5 quartiles. The line connecting the paired violins visualizes the direction of ImCoh changes between pre- and poststimulation. Asterisk (^*) denotes a statistically significant pre- to postchange ^*P < 0.05.