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Fig. 5. Measured excitation patterns (circles) obtained from two cupulae (A,B) with
model fits (solid lines) for three different distances, d, of the
stimulus sphere along the y-axis. (A) Distances d from
bottom to top are 7, 12 and 17 mm. (B) Distances d from bottom to top
are 10, 15 and 20 mm. Broken lines in both panels are fairly well intersecting
the zeros of the extracellular receptor potentials (ERPs) (indicated by
crosses on the equidistant x-axes) and therefore illustrate the
linear widening (S; Eqn 3a) of the excitation patterns with
increasing distance d.