Analysis of the strength of direct inhibition on SGP cell clusters

For this analysis, 19 SGP neurons and their corresponding inhibitory input maps in the NMDA/AMPA blocked condition were analysed. Here we analysed the IPSC amplitudes either cell type‐wise or stimulation position‐wise. In the cell type‐wise analysis, we first calculated the mean IPSC value of an inhibitory input map of each cell. The mean values were then separated into three clusters, according to the cell type cluster to which the cells were allocated by hierarchical clustering. In the stimulation position‐wise analysis, we calculated all IPSC amplitudes evoked by multiple stimulation positions for each cell, and these were then segregated according to the cluster to which the cells were allocated by hierarchical clustering. To test for statistical differences between cell clusters on either the cell type‐wise or stimulation position‐wise IPSC amplitudes, we used a two‐sample Kolmogorov–Smirnov test.