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. Author manuscript; available in PMC: 2017 Apr 1.
Published in final edited form as: Psychopharmacology (Berl). 2016 Jan 27;233(7):1245–1255. doi: 10.1007/s00213-016-4208-y

Fig. 2.

Fig. 2

ERP waveforms measured at midline frontal (Fz) and fronto-central (FCz) electrodes elicited by compatible (C) and incompatible trials (I), as a function of previous trial compatibility, in each beverage group. AC = alcohol + caffeine; PC = placebo alcohol + caffeine; AP = alcohol + placebo caffeine; PP = placebo alcohol + placebo caffeine. The N2 is the prominent negative-going voltage deflection occurring around 250 ms post-stimulus onset, indicated by the black arrowheads in each panel.