Figure 2.
Neurograms depicting the onset response of rat A1 neurons to 20 English consonants. Multiunit data was collected from 445 recording sites in 11 anesthetized, experimentally naive adult rats. Average poststimulus time histograms (PSTH) derived from 20 repeats are ordered by the characteristic frequency (kHz) of each recording site (y axis). Time is represented on the x axis (−5 to 40 ms). The firing rate of each site is represented in grayscale, where black indicates 400 Hz. For comparison, the mean population PSTH evoked by each sound is plotted above the corresponding neurogram. For reference, ‘gad’ evoked the highest population firing rate of 288 Hz. As in Figure 1, rows differ in the place of articulation of each consonant, and columns differ in the manner of articulation. See Supplementary Figure 2 for a direct comparison between stop-consonant spectrograms and neurograms.