Figure 3. Probability of Connection among Adjacent Neurons Does Not Depend Strongly on the Interneuron Distance.

(A) Relative location of labeled neurons in the plane of the section. Positive direction of y-axis is aligned with apical dendrite. Potentially presynaptic neuron is located at the origin. Red—bidirectionally connected pairs; blue—unidirectionally connected pairs; green—unconnected pairs.

(B) Histogram showing the numbers of pairs in the three classes as a function of distance between neurons (Euclidian distance was calculated from relative X, Y, Z coordinates).

(C) Probability of connection versus interneuron distance. Error bars are 95% confidence intervals estimated from binomial distribution.