Figure 3.

The quantitative index of spatial ordering within and between cell types. The index approximates the tendency of the cells to “repel” each other, i.e., the rate of rise of the density profiles shown in Fig. 2B. The denser populations appear to be less regular than the less dense ones, possibly because of positional hindrances introduced when the somata of a population (and its unrelated neighbors) occupy a significant fraction of the mean intersoma distance. For present purposes, though, this is incidental. The central point is that all of the individual populations were regular and none of the between-population comparisons were. In fact, for the between-type comparisons, the mean density was attained at the nearest measured interval so that the slope of the rise was technically infinite.