Sensitivity of BPR to dendritic localization. (A) Type II BPRs were elicited by 500 Hz—10 spikes pf or aa bursts in four different dendritic sectors, labeled I to IV. SC synapses were activated by 130 Hz—three spikes trains and were located in the same sectors. In all cases the number of pf or aa and SC synapses was the same as in the case of random synapses distribution. Left, distribution of active pf synapses. The raster plots and PSTH reveal that BPRs are different in the four sectors, mostly due to a different duration of the pause. Right, effect of activation of aa synapses in the same sectors and with the same inhibitory synapses. Note that the raster plots and PSTH look similar to those of pf except for sector I, in which the pause is longer. (B) Different localization of inhibitory synapses has a marginal effect on BPRs elicited by pf synapse (almost the same happened for aa synapses, not shown).