Optimizing electrode positions and analysis strategies for multifocal VEP recordings by ROC analysis.

The multifocal visual evoked potential (mfVEP) is an important tool to test visual pathway function. The aim of this study was to optimize electrode positions in mfVEP recordings. For analysis we applied a receiver operating characteristic (ROC), a method that inherently corrects for multiple testing. We found that a combination of two perpendicular derivations-both straddling the inion-was the most effective recording setup. Adding more than two derivations did not significantly increase the sensitivity. Thus optimal mfVEP detection can be achieved with a fairly simple recording setup which may facilitate mfVEP recordings in basic research and clinical routine.