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Titolo:
Attention-dependent allocation of auditory processing resources as measured by mismatch negativity
Autore:
Dittmann-Balcar, A; Thienel, R; Schall, U;
Indirizzi:
Univ Essen Gesamthsch, Biol Psychiat Res Grp, Univ Clin Psychiat & Psychotherapy, D-45147 Essen, Germany Univ Essen Gesamthsch Essen Germany D-45147 rapy, D-45147 Essen, Germany Univ Newcastle, Fac Med & Hlth Sci, Discipline Psychiat, Newcastle, NSW 2308, Australia Univ Newcastle Newcastle NSW Australia 2308 ewcastle, NSW 2308, Australia
Titolo Testata:
NEUROREPORT
fascicolo: 18, volume: 10, anno: 1999,
pagine: 3749 - 3753
SICI:
0959-4965(199912)10:18<3749:AAOAPR>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
SELECTIVE-ATTENTION; INFORMATION; GENERATORS; MMN;
Keywords:
auditory discrimination task; frontal cortex; mismatch negativity (MMN); P3b; planum temporale; processing resource allocation; selective attention; temporal cortex; visual discrimination task;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Dittmann-Balcar, A Univ Essen Gesamthsch, Biol Psychiat Res Grp, Univ ClinPsychiat & Psychotherapy, Virchowstr 174, D-45147 Essen, Germany Univ Essen Gesamthsch Virchowstr 174 Essen Germany D-45147
Citazione:
A. Dittmann-Balcar et al., "Attention-dependent allocation of auditory processing resources as measured by mismatch negativity", NEUROREPORT, 10(18), 1999, pp. 3749-3753

Abstract

MISMATCH negativity (MMN) is a pre-attentive event-related potential measure of echoic memory. However, recent studies suggest attention-related modulation of MMN. This study investigates duration-elicited MMN in healthy subjects (n=12) who were performing a visual discrimination task and, subsequently, an auditory discrimination task in a series of increasing task difficulty. MMN amplitude was found to be maximal at centro-frontal electrode sites without hemispheric differences. Comparison of both attend conditions (visual vs auditory), revealed larger MMN amplitudes at Fz in the visual taskwithout differences across task difficulty. However, significantly smallerMMN in the most demanding auditory condition supports the notion of limited processing capacity whose resources are modulated by attention in response to task requirements. (C) 1999 Lippincott Williams & Wilkins.

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Documento generato il 19/01/20 alle ore 09:04:26