Figure 4.

Developmental regulation of EPSC amplitude evoked by minimal stimulation of RGC axons. A, Examples of minimally evoked EPSCs, including failures, recorded from a stage 42, 45, and 49 tectal neuron. B, Cumulative probability plot of minimally stimulated EPSCs for stage 42–43, 44–46, and stage 49 tadpoles, showing a decrease (leftward shift) of EPSC amplitudes between stages 42 and 45 and a subsequent increase (rightward shift) between stages 45 and 49. Data points represent the range of EPSC amplitudes recorded from all the cells of a given stage. We plotted an equal number of events from each cell so that each cell is represented equally. The failures are excluded. *p < 0.01. C, Averaged minimal stimulation-evoked EPSC amplitudes as a function of developmental stage.