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. 2021 May 17;10:e63798. doi: 10.7554/eLife.63798

Figure 5. Concentric and radial gratings preference.

(A) Cell map of concentric/radial index (CRI). Positive CRI indicates preference for concentric over radial gratings and vice versa. Concentric grating-selective neurons and radial grating-selective neurons are spatially clustered, and the overall distribution was consistent with curve/corner selectivity (Figure 3A). Scale bar = 100 μm. (B) Scatterplot of curve/corner index (CVCNI) against CRI, which were positively correlated. The red dash line represents the linear regression line. (C) CRI cell maps at spatial frequencies of 1, 2, and 4 cycles/° (cpd). The map structure remained consistent.

Figure 5.

Figure 5—figure supplement 1. Responses to Cartesian, concentric, and radial gratings.

Figure 5—figure supplement 1.

(A) Responses (ΔF/F0, mean ± SE) of three example neurons to grating stimuli. (B) Scatterplot of neurons’ maximum responses to concentric and radial gratings against Cartesian gratings. 48.4% of 535 neurons recoded in the imaging area showed significantly stronger responses to concentric or radial gratings (red, n = 11 for monkey A, and n = 8 for monkey B, one-way ANOVA, p<0.05). Only 2.2% showed significantly stronger responses Cartesian gratings (blue). Black indicates no significant preference (p≥0.05). (C) Histogram of neurons’ optimal Cartesian gratings spatial frequencies. Neuronal responses to its optimal Cartesian gratings at spatial frequencies of 1, 2, and 4 cycle/° were compared using one-way ANOVA (p<0.05).
Figure 5—figure supplement 2. Concentric/radial index (CRI).

Figure 5—figure supplement 2.

(A-B) CRI were tested, comparing the maximum responses to concentric gratings against the maximum responses to radial gratings. One-way ANOVA, p<0.05, n = 10. (C-D) Average CRI and -CRI (mean ± SE) plotted against the distances to the CV or CN domain boundary.