Response amplitude and polarity change in a dose dependent manner with stimulus intensity.

<p>A and B, Representative averaged traces from wild-type and <i>rd/rd</i> INL cells, under CdCl₂ (0.5mM), display fast depolarization responses at low stimulus amplitudes that reverse in polarity as stimulus intensity is increased. C, Raw trace from the <i>rd/rd</i> cell shows the existence of a large amplitude membrane oscillation, even under synaptic block, that is larger than the electrically evoked response, shown with arrow.