Fig. 1.

Patterning of putative synapses between synaptically coupled neurons. (A) Synaptically coupled L5 PCs stained and in false color. (B) Schematic of the criteria for determining whether an apposition is a putative synapse (Left) or not (Right) (Materials and Methods). (C) A reconstruction of two synaptically coupled neurons (asterisks indicate locations of putative synapses). (D) An axogram (Left) and dendrogram (Right) indicating how synaptic locations are recorded. (E) Histograms of locations of putative synapses on the axon (Left, blue) and dendrites (Right, red), where the x axis is the axonal or dendritic branch order where (Upper) the putative synapse was observed (x axis) or (Lower) the path distance to the putative synapse along the axon or dendrite from the soma.