In this time window, the principal source of theta power was estimated to LT cortex. It was sensitive to lexical-semantic characteristics as shown by the overall SW–PW difference, F(1,21) = 5.1, p < 0.05. This difference interacted with beverage in LT, F(1,21) = 13.3, p < 0.01, as it was significant only under placebo, F(1,21) = 12.8, p < 0.01, but not under alcohol, F(1,21) = 0.3, n.s. Alcohol selectively attenuated theta power to meaningful SW, F(1,21) = 9.5, p < 0.01, but not PW, F(1,21) = 0.4, n.s. Very similar effects were observed in the left ACC (Table 1), with SW eliciting stronger theta power under placebo, F(1,21) = 7.8, p < 0.05, but not alcohol, F(1,21) = 2.1, n.s. Alcohol attenuated theta estimated to the ACC overall, as indicated by the main effect of beverage, F(1,21) = 11.8, p < 0.01. The only right hemisphere contribution in this time window was alcohol-induced attenuation of theta power in the LT cortex, F(1,21) = 7.4, p < 0.05.
