Figure 5. Firing patterns to different types of natural motion are similar within a cell type but different across types.

Here five cells were recorded simultaneously on a multi-electrode array. Each cell responded similarly to all three motion stimuli. The brisk-transient and ON–OFF direction-selective (DS) cells responded with high peak rates and low firing fractions whereas the brisk-sustained, ON DS, and local-edge cells responded with lower peak rates and higher firing fractions. The brisk-transient and ON–OFF DS responses showed the lowest spike-time jitter across trials whereas the brisk-sustained and local-edge responses showed the highest. For sluggish types, mean firing rates were about half that of the brisk cell types (adapted from Koch et al. 2006).