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Pattern reversal evoked cortical responses in normals: A study of different methods of stimulation and potential reproducibility by O. Meienberg; L. Kutak; C. Smolenski; H. P. Ludin is a Medicine article available to read on EtoBox.

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Using a commercially available television set for stimulation of 78 healthy subjects, the upper limit of normal for the latency of the major positive wave (p 100) of checkerboard pattern reversal evoked potentials is practically the same as that obtained by employing slide projector combined with a rotating mirror. Potentials evoked by a small pattern, for purely foveal stimulation, were often difficult to evaluate exactly. Fixation of a large pattern at the upper border of the stimulus field brought no advantages as compared to the usual fixation in the center. Continuous prolonged recordings, with successive averaging of 64 pattern reversals, confirmed statements that only the major positive wave and its latency are constantly reproducible without being influenced by fatigue or inattention. Repeated examinations in the same subjects at intervals of 2 weeks showed a considerable spread of the latencies from one session to the other but the absolute values always ranged within the normal. More or less large latency differences (up to 12ms with large pattern stimulation) were found in every subject at least once. A longer latency found at a control examination, or a newly appearing

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Author

O. Meienberg; L. Kutak; C. Smolenski; H. P. Ludin

Publisher

Springer; Springer-Verlag; Dr. Dietrich Steinkopff Verlag; Springer Science and Business Media LLC; Society for Mining, Metallurgy and Exploration Inc. (ISSN 0340-5354)

Published

1979

Language

EN

Field

Medicine (Health Sciences)