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Figure 7


Fig. 7. Comparison of temporal frequency (TF) tuning at two receptive field locations of HSN cells showing sexually dimorphic contrast sensitivity and temporal dynamics. Frontal receptive field (A,C,E) for HSN cells is defined as 0° azimuth and 60° elevation. Lateral receptive field (B,D,F) is defined as 90° azimuth and 60° elevation. Responses were estimated for Michelson contrasts 1.0 (A,B) and 0.2 (C,D) and the contrast sensitivity was calculated for a criterion response of 2 mV (E,F). Estimated response and contrast sensitivity were calculated from contrast ramp data (for details see Materials and methods). Spatial frequency 0.1 cycles deg.-1. Values are means ± s.e.m.; males, N=5 (filled squares), females, N=6 (open circles).





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