[Influence of Long-Term Stimulation on Pattern-Reversal Visual Evoked Cortical Potentials].
In 20 subjects, we recorded the pattern-reversal visual evoked cortical potential (VECP) over a period of 30 min. We could not find any remarkable alterations of the peak times, they were unchanged over the time. During the first 10 min, the amplitudes showed a clear tendency to decrease if one evaluated the averaging value of the whole group. After this time, there were no significant changes. But we learned a quite different behavior of amplitudes evaluating the record of each subject. We found 5 types of different behavioral modulated responses. The problems of long-term investigation are sophisticated and need further investigation to learn which different factors have an impact on VECP. From a clinical point of view, a long-term investigation shows no relevant potential alterations.
Müller
W
W
Abteilung für Elektrodiagnostik und Neuroophthalmologie, Medizinische Hochschule Erfurt, BRD.
Gauss
J
J
D000328:Adult; D005074:Evoked Potentials, Visual / Q000502:physiology*; D006185:Habituation, Psychophysiologic; D006801:Humans; D008137:Longitudinal Studies; D008875:Middle Aged; D010364:Pattern Recognition, Visual; D010775:Photic Stimulation; D014793:Visual Cortex / Q000502:physiology*
Einfluss von Langzeitreizung auf das visuell evozierte kortikale Muster-Umkehr-Potential.