Fig. 3

Changes in shear wave velocity after the adjustment. The black circles represent means and the bars represent standard deviations. At the opioid-induce rigidity, the velocity was faster than that at the baseline. At the complete muscle relaxation, the velocity was slower than that at the baseline. Also shown were changes in velocity before adjustment (gray circles and bars, same as Fig. 1). ***p < 0.001 versus baseline condition