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Titolo:
The effects of ocular artifacts on (lateralized) broadband power in the EEG
Autore:
Hagemann, D; Naumann, E;
Indirizzi:
NIA, Lab Personal & Cognit, NIH, Baltimore, MD 21224 USA NIA Baltimore MDUSA 21224 ersonal & Cognit, NIH, Baltimore, MD 21224 USA Univ Maryland Baltimore Cty, Dept Psychol, Baltimore, MD 21228 USA Univ Maryland Baltimore Cty Baltimore MD USA 21228 altimore, MD 21228 USA Univ Trier, Fachbereich Psychol 1, D-5500 Trier, Germany Univ Trier Trier Germany D-5500 bereich Psychol 1, D-5500 Trier, Germany
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 2, volume: 112, anno: 2001,
pagine: 215 - 231
SICI:
1388-2457(200102)112:2<215:TEOOAO>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
QUANTITATIVE-ANALYSIS; CEREBRAL ASYMMETRY; FREQUENCY-DOMAIN; EYE-MOVEMENTS; REMOVAL; EOG; GUIDELINES; BLINKS;
Keywords:
electroencephalography; ocular artifacts; spectral analysis; alpha power density; hemispheric lateralization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
61
Recensione:
Indirizzi per estratti:
Indirizzo: Hagemann, D NIA, Lab Personal & Cognit, NIH, 5600 Nathan Shock Dr, Baltimore, MD 21224USA NIA 5600 Nathan Shock Dr Baltimore MD USA 21224 e, MD 21224USA
Citazione:
D. Hagemann e E. Naumann, "The effects of ocular artifacts on (lateralized) broadband power in the EEG", CLIN NEU, 112(2), 2001, pp. 215-231

Abstract

Objective: Empirical evidence suggests that blinks and eye movements do not generate substantial activity outside the delta and theta range, and thatthe propagation of ocular activity to the EEG is rather symmetrical. Theseobservations suggest that an alteration of the alpha and beta asymmetry ofthe EEG due to ocular artifacts is not likely to occur. The aim of the present study is to examine the effects of ocular artifacts on broadband EEG parameters. Methods: EEG and EOG were recorded from 31 participants in a resting condition with eyes open and closed, allowing for spontaneous ocular activity. General effects: of ocular artifacts were examined with mean comparisons, and differential effects were examined with correlation analysis of data portions that were selected for a presence or absence of artifacts. Results: At single sites, blinks and eye movements exerted substantial general effects on the whole EEG spectrum, but there were no substantial differential effects of artifacts in the alpha and beta bands. except at the frontopolar sites. The distorting effects of ocular artifacts were smaller in magnitude for asymmetry than for single site measures. Conclusions: The control of ocular artifacts may be dispensable for correlation analyses of alpha or beta band parameters. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.

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Documento generato il 26/01/20 alle ore 09:45:48