A MULTIPLE-FREQUENCY, MULTIPLE-REGION PATTERN ELECTRORETINOGRAM INVESTIGATION OF NONLINEAR RETINAL SIGNALS

it has been proposed that the spatial frequency doubled (FD) illusion may originate from Y-like non-linear retinal ganglion cells. if the co ntrast of multi-frequency stimuli is increased, Y cells show a phase a dvance in the self-sum frequencies but not in other output frequencies ,We looked for these effects with a multi-region pattern electroretino gram (PERG) displaying the sum of two temporal frequencies in each Vis ual field location, Regional variation was found in the recorded sum a nd difference frequencies. The results indicate that PERG signals beco me dominated by responses from Y-like cells when the FD illusion is se en.