Modulation of BPR was investigated in detail in Z+ PC type II responses, in which BPR was the most pronounced. Increasing the strength of inhibition did not change the burst but prolonged the pause. Moreover, responses to aa synapses were differentiated by considering their specific location on distal dendrites. The aa generated weaker BPR than pf probably because of their longer electrotonic distance from soma (see also Figure 6A). However, the aa and pf BPR became very similar when aa transmission strength was increase, reproducing the functional equivalence of transmission along these two transmission lines (Sims and Hartell, 2005, 2006; Walter et al., 2009).