Fig. 3.

Synaptic reorganization after single cell ablation. A, B, Histograms of the average EPSP amplitude evoked in GI₁ in control animals (n = 5) and in GI₂-ablated animals (n = 5). A, After GI₂ablation, the h to GI₁ EPSP amplitude increased by 105% (t test; p < 0.001).B, After GI₂ ablation, the d to GI₁ EPSP amplitude decreased by 35% (ttest; p = 0.05). C,D, Histograms of the average EPSP amplitude evoked in GI₁ in control animals (n = 5) and in GI₃-ablated animals (n = 5).C, After GI₃ ablation, the h to GI₁ EPSP amplitude did not change significantly (t test; p > 0.05).D, After GI₃ ablation, the d to GI₁ EPSP amplitude increased by 48% (ttest; p < 0.05). A schematic drawing of the relevant elements of the synaptic circuitry in the control and the experimental condition is presented below each histogram.