<p>No significant correlation was observed when examining the relationship between N1 power and 40-Hz steady-state power in S2 (left panel; R = −0.08, P = 0.74), as well as between N1 power and 60-Hz steady-state power in S3 (middle panel; R = −0.01, P = 0.97). In contrast, significant correlation was observed when examining the relationship between 40-Hz steady-state power in S2 and 60-Hz steady-state power in S3 (right panel; R = 0.71, P<0.001). Each green point represents one subject, and the red lines represent the best linear fit.</p
