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Representative P20-N40 waveforms averaged from an individual DBA/2 mouse. Waveforms obtained prior to drug administration (Baseline) and after 0.6 mg/kg varenicline administration. Varenicline administration (0.6 mg/kg, IP) resulted in a decreased T/C ratio indicating an improvement in P20-N40 inhibition. Tick marks denote the waveform and arrows indicate audio stimulus onset. The noise at the start of the waveform represents the audio stimulus artifact. Calibration 20 μV/10 ms.
