Figure 1From: Auditory target processing in methadone substituted opiate addicts: The effect of nicotine in controls P300 ERP grand average plots. ERP grand average plots at electrodes Fz, Cz and Pz (μV) in subgroups of methadone substituted patients with and without additional non-opioid drug use and in controls with and without nicotine use. Note: according to electrophysiological convention negative evoked potential data are shown upwards.Back to article page