Figure 10.

Laminar firing to a small bar moving downwards along the vertical meridian at three different positions along the cytoarchitectural border between areas 17 and 18 mapping the vertical meridian. (A) The moving bar was introduced moving from the center of field of view. From the top laminar post stimulus histogram from 16 leads across the cortex at the point mapping the center of field of view showing the latency differences. At 420 μm, i.e., 85 ms after the appearance the neurons in the upper layers fire first. At 980 μm, i.e., at 195 ms and after the FB the infra-granular neurons lead the onset of firing. (B) Current source density at the center cortical point with the onset latencies of the laminar onsets of firing (from M. Harvey, unpublished material from experiments described in Harvey et al., 2009).