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Functional Brain Dynamics of Evoked and Event-Related Potentials From The Central Auditory System

2010; American Speech–Language–Hearing Association; Volume: 14; Issue: 1 Linguagem: Inglês

10.1044/hhd14.1.12

1940-7661

Phillip M. Gilley, Anu Sharma,

EEG and Brain-Computer Interfaces

No AccessPerspectives on Hearing and Hearing Disorders: Research and DiagnosticsArticle1 Feb 2010Functional Brain Dynamics of Evoked and Event-Related Potentials From The Central Auditory System Phillip M. Gilley, and Anu Sharma Phillip M. Gilley Department of Speech, Language, and Hearing Science, University of Colorado at BoulderBoulder, CO Google Scholar and Anu Sharma Department of Speech, Language, and Hearing Science, University of Colorado at BoulderBoulder, CO Google Scholar https://doi.org/10.1044/hhd14.1.12 SectionsAboutFull TextPDF ToolsAdd to favoritesDownload CitationTrack Citations ShareFacebookTwitterLinked In Abstract Source localization of electrical activity in the brain can be greatly improved by testing the experimental variability in the signals being localized. The most widely used method for extracting evoked potential (EP) signals from the EEG is averaging. Averaging multiple EEG epochs suppresses background noise, revealing EP components that are time and phase locked to the stimulus event. However, averaging also obscures information about inter-trial variability and reveals little, if any, information about event related spectral perturbations (ERSPs) in the time-frequency plane. Recent advances in signal processing have led to advanced methods for examining single-trial contributions to the evoked potential. These include methods for describing both phase locked and non-phase locked activity. When combined with multi-channel recordings of the EP, modeling of the underlying dynamic brain signals provides information about the variance and nature of the EP components. The ability of these dynamic, single-trial analyses to reveal complex changes in the EP response makes them suitable for examining the physiology and pathophysiology of the central auditory system. 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Shafer, Evis Haxhari, Kevin Kiprovski, Katherine Behrmann and Tara Griffiths Volume 14Issue 1February 2010Pages: 12-20 Get Permissions Add to your Mendeley library History Published in issue: Feb 1, 2010 Metrics Topicsasha-topicsasha-sigsasha-article-typesCopyright & Permissions© 2010 American Speech-Language-Hearing AssociationPDF downloadLoading ...