Cognitive Evoked Potentials


Authors: Prof. MUDr. Martin Bareš, Ph.D.
Authors‘ workplace: I. neurologická klinika, LF MU a FN u sv. Anny v Brně
Published in: Cesk Slov Neurol N 2011; 74/107(5): 508-517
Category: Minimonography

Overview

Electrical brain activity provides objective information about human brain function. Of parti­cular interest are cognitive, or event-related, potentials (ERPs), including contingent negative variation (CNV), P300 or P3, and the complex of middle- and long-latency evoked potentials, mismatch negativity (MMN) and bereitschaftspotential (BP), all of which are classified as slow cognitive potentials. Cognitive evoked potentials are considered the results of the activities of the complex neuronal networks that are responsible for detection and processing of new inputs, for discrimination, and for mental processing. Slow cognitive potentials are related to mental activities that are conscious as well as unconscious. Among the electrophysiological phenomena that can be recorded, ERPs are closely related to the central nervous activities of daily living. The author provides an overview of cognitive evoked potentials, the methodo­logy and recording issues associated with them, distribution in terms of scalp and intrace­rebral locations, and clinical outcome.

Key words:
contingent negative variation – bereit­schaftspotential – P3 wave – cognitive evoked potential – mismatch negativity


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