Fig. 6.

RF temporal profiles of LP neurons with polarity-opposed subfields. A: scatter plot of the prespike times associated with maximal spike probability (peak latency) of dark subfields as a function of their paired bright subfields. Most neurons had similar subfield peak latency values (40/60 cells with <50 ms difference between subfield peak latencies). B: results from cluster analysis of latency scatter differences between bright and dark subfields. K-means cluster analysis identified three groups of cells: one with similar subfield latency scatter values (cluster 2: Δ −19 ± 5 ms, n = 44) and two more groups with distinct subfield latency scatter values (cluster 1: Δ 280 ± 46 ms, n = 6, cluster 3: Δ −174 ± 36 ms n = 10).