SciELO - Scientific Electronic Library Online

 
vol.41 issue4On-line analysis of biosignals for the automation of total and specific sleep deprivation in the ratNon-homogeneous spatial configuration of vibrissae cortical representation in layer IV of the barrel somatosensory cortex author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Biological Research

Print version ISSN 0716-9760

Abstract

ORTEGA, RODRIGO; LOPEZ, VLADIMIR  and  ABOITIZ, FRANCISCO. Voluntary modulations of attention in a semantic auditory-visual matching Task: an ERP study. Biol. Res. [online]. 2008, vol.41, n.4, pp.453-460. ISSN 0716-9760.  http://dx.doi.org/10.4067/S0716-97602008000400010.

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 cióse temporal proximity by auditory stimuli consisting of the Spanish word for "man" and "woman" ("hombre" or "mujer"). In 80% of the triáis 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 % of the triáis). 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.

Keywords : Voluntary attention; semantic processing; Top down control; ERP components.

        · text in English     · English ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License