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Fig. 9. E-afferent response (A) and I-afferent response (B). (Top) Averaged
(n=8) vector plots based on particle motions caused by the vortex
stimulus. Particle motions were recorded (from left to right) at first, second
and third threshold crossing. (Middle) Raster plots of the responses and
(bottom) peri-stimulustime histograms (PSTHs; bin width 20 ms) based on
these raster plots. Note that changes in the initial response components from
excitation to inhibition are associated with approximate 180° changes in
flow direction at the rostro-caudal level of the neuromasts (gray bars on fish
schematic). See Fig. 7 for
further details.