Definition of Network Connectivity by Synapse Type

Gap junctions are used in the first part of the Results section (the guided tour) in order to establish a baseline of connectivity between cells, but are not used to explore selective connectivity in the first-mover analysis. In their application to this study, gap junction connections regardless of their functional directionality are collapsed into undirected links between cells. Only chemical synaptic connections were used in the first-mover analysis, and are distinguished between presynaptic and postsynaptic connections. While a comparison of gap junction and chemical synaptic connectivity might be useful for determining which cells establish an early set of electrical synapses, this analysis is not conducted in this paper.