<p><b>A</b>. Raster plot of typical changes in auditory responses of a CN neuron before, during and after electrical stimulation. <b>B</b>. Averaged spike numbers calculated within a 10-minute window during the observation period. <b>C</b>. Averaged response latencies calculated within a 10-minute window during the observation period. Arrowheads indicate supplementary injection of ketamine and xylazine. ES: electrical stimulation. N: no electrical stimulation.</p