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Fig. 4. Discharge patterns of goldfish posterior lateral line nerve (PLLN)-afferents to the vortex stimulus passing the fish laterally from anterior to posterior. Afferents responded with an initial increase (E-afferents, A) or decrease in discharge rate (I-afferents, B). In A and B, raster plots of the responses to 10 (A) and 8 (B) stimulus presentations and their corresponding peri-stimulus–time histograms (PSTHs; binwidth 20 ms) are shown. Top traces in A and B show original recordings that correspond to the respective first trace in the raster plots. Horizontal bars below the PSTHs indicate the time of valve opening. The initial response components were fairly reproducible from trial to trial. This was quantified by calculating the correlation coefficients between individual trials (n=5) for the first (A and B, top right) and second (A and B, bottom right) 300 ms following valve opening.





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