Figure 5. Sensory gating in intracranial signals recorded from ICc, Au1 and ACC. A–C, Example iAEPs (left panels) and PSTHs (of all units recorded during a single session) recorded from the ICc, Au1, and ACC, respectively. Magenta dots represent peak-to-peak measurement of the first major ERP component at each region. Latencies were calculated using the onsets of the initial positive peak for the ICc, the main negative deflection for the Au1, and the initial trough for the ACC. D–F, Amplitude of ERP components measured as indicated in A–C in each region, i.e., ICc (n = 12), Au1 (n = 11), and ACC (n = 10), in response to the first (red) and second (blue) tones. The larger the area between two curves is, the stronger the sensory gating is. G, The ratio of sensory gating for different components. The gating increases progressively from the ICc through auditory ERP to the ACC ERP. Error bars signify SEM.