Characterization of N200 and P300: Selected Studies of the Event-Related Potential

Overview

Journal Int J Med Sci

Specialty General Medicine

Date 2005 Oct 22

PMID 16239953

Citations 235

Authors

Salil H Patel

Pierre N Azzam

Affiliations

Soon will be listed here.

Abstract

The Event-Related Potential (ERP) is a time-locked measure of electrical activity of the cerebral surface representing a distinct phase of cortical processing. Two components of the ERP which bear special importance to stimulus evaluation, selective attention, and conscious discrimination in humans are the P300 positivity and N200 negativity, appearing 300 ms and 200 ms post-stimulus, respectively. With the rapid proliferation of high-density EEG methods, and interdisciplinary interest in its application as a prognostic, diagnostic, and investigative tool, an understanding of the underpinnings of P300 and N200 physiology may support its application to both the basic neuroscience and clinical medical settings. The authors present a synthesis of current understanding of these two deflections in both normal and pathological states.

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