Figure 3.

In separate experiments, high potassium puffs evoked action potentials in OHCs and EPSCs in type II afferents. A, Overlay of current-clamp recordings of responses from 4 OHCs; 10 ms duration puff of 40 mm KCl solution at t = 0 in A–C. B, Voltage-clamp traces from two type II afferents (different experiments from A) showing waveform of evoked EPSCs. EPSCs were in the interval between 7 and 40 ms in which OHC spikes occurred, and during which EPSCs were classified as “evoked.” Red trace from a different experiment than remaining traces. C, Scatterplot showing timing of all EPSCs evoked by puff stimulation of a single OHC, 109 μm from the recording site. A different experiment than in B.