Fig. 6.

Static shapes elicit little sustained response in higher areas. A–D: single-unit responses to static and moving shapes. For static shapes, we show the raster plots for the whole 500-ms stimulus presentation; for moving shapes, we show the comparable window of the first 500 ms of the full 4,000-ms presentation duration. Vertical green line indicates stimulus onset. Horizontal black lines indicate average baseline firing rate (200 ms preceding stimulus onset); horizontal red lines indicate average firing rate during the 500-ms interval after stimulus onset. The number of trials varied for static shapes between 25 and 26 and for moving shapes between 12 and 13. Example neurons are the same as shown in Fig. 7. The example V1 neuron shows strong responses to static (A) and moving (C) shapes. The example TO neuron (B and D) shows little sustained response to static shapes, except for an initial transient, and a more sustained and selective response to moving shapes. E and F: comparison of average traces in response to static or moving stimuli in V1 (E) and highest area, TO (F). G: normalized sustained response to static and moving shapes in the different areas, averaged across all neurons (error bars indicate SE). H: SVM classifier performances when using data for moving and static shapes; equal intervals (500 ms) were used to calculate response rates. Red bars indicate threshold for significance of individual bars. Asterisks indicate significant differences between bars, calculated by shuffling experiment labels.