P2 latency of the flash visual evoked potential in dementia

P2 latency of the flash visual evoked potential was found not to be prolonged in 13 demented patients compared to age normative predictions derived from a control group. This finding contrasts with a number of studies of demented patients that found P2 latency to exceed normative data. It was stated that the result of normal latency in dementia can hardly be explained only in terms of the sampling method used in this study (unselected dements) and that the finding is possibly due to the increase in latency across the adult life span in normal aging which was found to be much higher than previously reported.