Extended Figure 2. Decrease in sigma power marks tone-evoked arousal.

Based on the local decline in sigma power in response to tone ( > 0.1 log(μV²)), the tone outcome was divided into arousal and otherwise maintained sleep. a. Mean sigma power traces in response to tone leading to either arousal or persistent sleep. b. The maximum value of sigma power maximum prior to tone (‘pre’) and the minimum sigma power after the tone (‘post’) for the defined arousal and sleep conditions. c. The difference in sigma power occurring in response to the tone. Significance was calculated by means of two-way repeated measures ANOVA with Šídák’s post hoc test (b, P = 0.035, pre; P = 0.023, post) or two-tailed paired t-test (c, P = 0.0034). n = 6. Data is shown as mean±SEM. *p < 0.05, **p < 0.01.