Figure 2: Temporal patterns of antagonistic activation by TcES (20 Hz, 1.2 mA, 10 ms).

(a−c) Temporal profiles of volumetric and oximetric signal changes after TcES averaged across 16 cats. (d−f) The slopes of reflectance changes for volumetric and oximetric responses. *indicates slopes significantly different from response baseline (Wilcoxon test, P < 0.05, n = 16). The gray rectangles denote the stimulus duration, which also shown in Figs 3, 4, 5. Error bars show SEM.