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Fig. 4. (A) Distribution of differences in preferred directions (on x axis
in units of radians) within each pair of selected patches. For the majority of
tests there was no difference in preferred direction (PrefDir.) between the
two patches (peak at zero). (B) The response range of each patch is plotted
against the response range of the other patch in the pair (the largest
response range was plotted on the x axis for all tests). Response
range was defined as the difference between the largest and the smallest
responses on the directional tuning curve. Values are means ±1 s.e.m.;
for N values, see Materials and methods.