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PCA of contour fragment response patterns. (A) PC1 for a simulated neural population (see Materials and Methods) with random response patterns. (B) PC1 for a simulated neural population with tuning for orientation. (C) PC1 for a simulated neural population with tuning for curvature direction. (D) PC1 for the observed response patterns in the V4 and SII data sets. (E) Example V4 neuron with a large projection onto PC1. (F) Example SII neuron with a large projection onto PC1.
