Short-term memory and averaged evoked cortical potentials.

Cortical electrical activity reflected by changes in N1 and CNV evoked potentials was compared to performance on a battery of neuropsychological measures of attention and short-term memory. Results supported the hypothesis that N1 reflects the accuracy of the short term memory image. Attentional processes indexed by CNV also appeared to be involved in establishing the memory trace. The two cortical generators appear to interact in some types of short-term memory tasks, but not in others.