[Analysis of the components of the electrically evoked response (EER) of the visual system by topography and...

In order to examine the possibility of the clinical application of the electrically evoked response (EER) of the visual system, we analyzed the significance of the various components of the EER by means of topography and dipole-tracing. By applying a constant electric current of 1.0mA (duration 5msec) to each eye, three rhythmical waves were recorded within 200msec from the stimulation. The peaks of these waves were named N1, P1, N2, P2, N3, P3. Among those components of EER, we found P2 to be localized in the visual cortex, though the other components did not show any specific localization. The results indicated the significance of analyzing P2 in order to further investigate the possible clinical applications of EER.