Figure 8.
Polar plots illustrating additional examples of orientation tuning curves for FS cells belonging to the 3 functionally defined clusters. The experimental data are displayed as data points, and the continuous lines represent the best fit to these data obtained with modified Von Mises’ formula. Data and lines in red correspond to spiking responses and data and lines in blue to postsynaptic responses. (A, B) FS cells of cluster 1. Cluster 1 corresponds to cells that are orientation selective but not direction selective. (C, D) FS cells of cluster 2. Cells belonging to cluster 2 appear broadly tuned for orientation and direction. (E, F) FS cells of cluster 3. Cluster 3 contains cells that show both orientation and direction selectivity. Scale bars in red represent 20 spikes/s in (A), 5 spikes/s in (B), 5 spikes/s in (C), 1 spikes/s in (D), 2 spikes/s in (E), and 5 spikes/s in (F). Scale bars in blue represent 2 mV except in (A, E, and F) and 1 mV in (B, C, and D).