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Fig. 10. Flow velocities (red and blue curves) calculated from interrogation windows
(see small squares on fish drawings). Interrogation windows with the red
vectors were at the position of the neuromast. The interrogation windows with
the blue vectors were slightly more rostral (A) or caudal (B), respectively.
The black traces in A and B show the discharge rates (spikes/40 ms) obtained
in a single trial of the E-afferent (A) and I-afferent (B) whose data are
shown in Fig. 9. Negative
velocities represent flow in the tail-to-head direction; positive velocities
represent flow in the head-to-tail direction. Gray bars indicate the times
when the first and third reproducible response components occurred. Zero
indicates the time of valve opening.