Voluntary modulations of attention in a semantic auditory-visual matching Task: an ERP study
Biol. Res
;
41(4): 453-460, Dec. 2008. ilus, tab
Artigo
em Inglês
| LILACS
| ID: lil-518400
ABSTRACT
The present study explores the neural correlates of voluntary modulations of attention in an auditory-visual matching task. Visual stimuli (a female or a male face) were preceded in close temporal proximity by auditory stimuli consisting of the Spanish word for "man" and "woman" ("hombre" or "mujer"). In 80 percent of the trials the gender of the two stimuli coincided. Participants were asked to mentally count the specific instances in which a female face appeared after hearing the word "man" (10 percent of the trials). Our results show attention-related amplitude modulation of the early visual ERP components NI and anterior P2, but also amplitude modulations of (i) the N270 potential usually associated with conflict detection, (ii) a P300 wave related to infrequency, and (iii) an N400 potential related to semantic incongruence. The elicitation of these latter components varied according to task manipulations, evidencing the role of voluntary allocation of attention in fine-tuning cognitive processing, which includes basic processes like detection of infrequency or semantic incongruity often considered to be volition-independent.
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Reconhecimento Visual de Modelos
/
Atenção
/
Semântica
/
Percepção Auditiva
/
Potenciais Evocados
Limite:
Adolescente
/
Adulto
/
Feminino
/
Humanos
/
Masculino
Idioma:
Inglês
Revista:
Biol. Res
Assunto da revista:
Biologia
Ano de publicação:
2008
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Chile
Instituição/País de afiliação:
Pontificia Universidad Católica de Chile/CL
Similares
MEDLINE
...
LILACS
LIS