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. 2016 Nov 23;7:13529. doi: 10.1038/ncomms13529

Figure 3. Association between response contrast nonlinearity and cortical orientation topography.

Figure 3

Left column: multi-unit activity (N=303; 6 cats). Middle column: single neuron activity (N=61; 6 cats). Right column: single neuron activity for one cat (N=20). (a–c) Semi-saturation value as a function of local orientation homogeneity. Black lines depict best-fitting linear regression. (d–f) Exponent of Naka–Rushton fit as a function of local orientation homogeneity. (g–i) Nonlinearity Index (a value closer to 1 corresponds to a less linear response and a value closer to 0 corresponds to a more linear response) as a function of local orientation homogeneity.