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Ereigniskorrelierte Potentiale (EKP) in Neurologie und Psychiatrie

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Zusammenfassung

Ereigniskorrelierte Potentiale (EKP) sind Hirnpotentiale, die vor, während und nach einem sensorischen Reiz oder psychischen Ereignis aus dem EEG mittels der Averager-Technik abgeleitet werden können [4]. Die EKP-Komponenten (N1, N2, P2, P3, Nd) sind elektrophysiologische Korrelate kognitiver Verarbeitung, von denen man annimmt, daß sie mit spezifischen Prozessen der Informationsverarbeitung verknüpft sind und in umschriebenen Hirnregionen generiert werden. EKP-Komponenten entsprechen zwischen Ableite- und Referenzelektrode sich auf- und abbauenden, nach positiv oder negativ gerichteten Spannungsschwankungen. EKP entstehen nach optischen, akustischen oder somatosensorischen Stimuli, die mit einer Aufgabenstellung (Instruktion) verbunden sind und eine diskriminante Entscheidung oder eine motorische Reaktion erfordern [12].

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