Long-Term Stability of Visually Evoked Potentials in Man

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Science  13 Dec 1963:
Vol. 142, Issue 3598, pp. 1480-1481
DOI: 10.1126/science.142.3598.1480


Although the variability of averaged evoked potentials as recorded from cortex in man has been a constant source of concern among investigators, the degree of variability has not received systematic treatment. The authors have accordingly undertaken an exploratory study of reliable differences that may occur in the first 300 msec of the averaged evoked response over long periods of time. Computer analysis of visually evoked responses in seven subjects over several weeks indicated stability of the response of each individual, with reliable intra-individual correlations. Inter-individual differences, however, were large. The evoked responses of different individuals were found to be unique.