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Titolo:
The quest for the EEG reference revisited: A glance from brain asymmetry research
Autore:
Hagemann, D; Naumann, E; Thayer, JF;
Indirizzi:
Univ Trier, FB Psychol 1, D-54286 Trier, Germany Univ Trier Trier Germany D-54286 r, FB Psychol 1, D-54286 Trier, Germany Univ Maryland Baltimore Cty, Dept Psychol, Baltimore, MD 21228 USA Univ Maryland Baltimore Cty Baltimore MD USA 21228 altimore, MD 21228 USA NIA, Lab Personal & Cognit, Baltimore, MD 21224 USA NIA Baltimore MD USA 21224 Lab Personal & Cognit, Baltimore, MD 21224 USA
Titolo Testata:
PSYCHOPHYSIOLOGY
fascicolo: 5, volume: 38, anno: 2001,
pagine: 847 - 857
SICI:
0048-5772(200109)38:5<847:TQFTER>2.0.ZU;2-E
Fonte:
ISI
Lingua:
ENG
Soggetto:
AVERAGE REFERENCE; BIOLOGICAL SUBSTRATE; SCALP POTENTIALS; AFFECTIVE STYLE; DEPRESSION; SURFACE; RESPONSIVENESS; EXPECTANCY; DISORDERS; FREQUENCY;
Keywords:
electroencephalography; reference problem; topographical analysis; hemispheric lateralization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
62
Recensione:
Indirizzi per estratti:
Indirizzo: Naumann, E Univ Trier, FB Psychol 1, Univ Ring 15, D-54286 Trier, Germany Univ Trier Univ Ring 15 Trier Germany D-54286 6 Trier, Germany
Citazione:
D. Hagemann et al., "The quest for the EEG reference revisited: A glance from brain asymmetry research", PSYCHOPHYSL, 38(5), 2001, pp. 847-857

Abstract

Recent findings suggested that the choice of the EEG reference might be a critical issue for the study of anterior asymmetry in the alpha band. The present paper investigates the validity of different reference schemes for the measurement of alpha asymmetry. A 32-channel resting EEG was recorded with a common vertex reference (Cz), and transformed into computer-averaged ears (A1 + A2), average reference (AR), and current source density derivations. A correlation analysis of an alpha asymmetry measure between all derivation schemes indicated a poor convergent validity for anterior sites but anexcellent convergent validity for posterior sites. Further analyses suggested the presence of substantial alpha activity at the various reference sites (Cz, Al + A2, AR), which might be similar in magnitude to anterior but smaller than posterior alpha. These findings suggest that the validity of a reference scheme is a function of the signal-to-noise ratio of the electrical activities at target and reference sites. The limitations of each reference scheme for the measurement of anterior alpha asymmetry are discussed.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/04/20 alle ore 11:58:48