An example of spike activities of A1 units when the cat was discriminating the click-trains.

<p>(A) Raster plots of neural spikes in 50 trials of standard stimuli (12.5 Hz) and 10 trials of target stimuli (16.7–200 Hz). Stimulus duration is indicated by the horizontal bar below the time axis. (B) PSTH representing the mean firing rate (1-ms bin, smoothed by Gaussian function with 5-ms SD) in each stimulus condition. (C) Cat's behavioral response (% Go) during the unit recording. (D) Psychometric and neurometric functions. Filled circle marked line represents the psychometric function. Thin lines represent the neurometric functions calculated from this neuron based on different temporal resolutions.