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Titolo:
A double-dissociation of English past-tense production revealed by event-related potentials and low-resolution electromagnetic tomography (LORETA)
Autore:
Lavric, A; Pizzagalli, D; Forstmeier, S; Rippon, G;
Indirizzi:
Univ Warwick, Dept Psychol, Coventry CV4 7AL, W Midlands, England Univ Warwick Coventry W Midlands England CV4 7AL 7AL, W Midlands, England Univ Wisconsin, Dept Psychol, Lab Affect Neurosci, Madison, WI 53706 USA Univ Wisconsin Madison WI USA 53706 ffect Neurosci, Madison, WI 53706 USA TH Darmstadt, Dept Psychol, Darmstadt, Germany TH Darmstadt Darmstadt Germany mstadt, Dept Psychol, Darmstadt, Germany Aston Univ, Neurosci Res Inst, Birmingham B4 7ET, W Midlands, England Aston Univ Birmingham W Midlands England B4 7ET 7ET, W Midlands, England
Titolo Testata:
CLINICAL NEUROPHYSIOLOGY
fascicolo: 10, volume: 112, anno: 2001,
pagine: 1833 - 1849
SICI:
1388-2457(200110)112:10<1833:ADOEPP>2.0.ZU;2-S
Fonte:
ISI
Lingua:
ENG
Soggetto:
WORKING-MEMORY; BRAIN POTENTIALS; ELECTRICAL-ACTIVITY; PREFRONTAL CORTEX; GERMAN INFLECTION; NEUROIMAGING DATA; VERB MORPHOLOGY; EPILEPTIC FOCUS; LANGUAGE; RULES;
Keywords:
past-tense production; single/dual route; event-related potentials; low-resolution electromagnetic tomography; microstate analysis; source localization;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
80
Recensione:
Indirizzi per estratti:
Indirizzo: Lavric, A Univ Warwick, Dept Psychol, Coventry CV4 7AL, W Midlands, England Univ Warwick Coventry W Midlands England CV4 7AL lands, England
Citazione:
A. Lavric et al., "A double-dissociation of English past-tense production revealed by event-related potentials and low-resolution electromagnetic tomography (LORETA)", CLIN NEU, 112(10), 2001, pp. 1833-1849

Abstract

Objectives: Evidence of systematic double-dissociations of neural activityassociated with the generation of regular and irregular past tense in healthy individuals may prove decisive in distinguishing between single- and dual-route models of morphological processing, because the former (connectionist models of morphological processing) have only been able to simulate double-dissociations of past-tense morphology as low-probability phenomena. Methods: Twenty-eight channel event-related potentials (ERPs) were recorded in response to past-tense production and subsequently analyzed using a 3-stage strategy,Results: A data-driven algorithm temporally segmented the ERPs into 16 distinct epochs of stable field configuration (microstates). A space-oriented brain electric field analysis determined that one of those epochs, 288-321 ms after the verb stem presentation, showed significant differences betweenthe regular and irregular verb conditions. As a further test of these results, a novel source localization technique that computes 3-dimensional distribution of cortical current density in the Talairach brain atlas - low-resolution electromagnetic tomography - found in the above microstate more activity for regulars in the right prefrontal and right temporal areas and forirregulars in the left temporal areas and the anterior cingulate cortex, which can be taken as evidence of systematic double-dissociation. Conclusions: The present results achieved with a source localization technique provide evidence of a two-way compartmentalization of neural activity corresponding to regular and irregular past tense, thus corroborating the dual-mechanism character of verb morphology. (C) 2001 Elsevier Science Ireland Ltd. All rights reserved.

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Documento generato il 23/10/20 alle ore 14:28:05