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The P3 produced by auditory stimuli presented in a passive and active condition : modulation by visual stimuli


The P3 produced by auditory stimuli presented in a passive and active condition : modulation by visual stimuli

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dc.contributor.author Wronka, Eligiusz [SAP11017473] pl
dc.contributor.author Kuniecki, Michał [SAP11018119] pl
dc.contributor.author Kaiser, Jan [SAP11003885] pl
dc.contributor.author Coenen, Anton pl
dc.date.accessioned 2015-02-19T18:16:14Z
dc.date.available 2015-02-19T18:16:14Z
dc.date.issued 2007 pl
dc.identifier.issn 0065-1400 pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/3225
dc.language eng pl
dc.title The P3 produced by auditory stimuli presented in a passive and active condition : modulation by visual stimuli pl
dc.type JournalArticle pl
dc.description.physical 155-164 pl
dc.description.additional Bibliogr. s. 164. Streszcz. ang. pl
dc.identifier.weblink http://ane.pl/pdf/6717.pdf pl
dc.abstract.en The aim of this study was to investigate how the processing of auditory stimuli is affected by the simultaneous presentation of visual stimuli. This was approached in an active and passive condition, during which a P3 was elicited in the human EEG by single auditory stimuli. Subjects were presented tones, either alone or accompanied by the simultaneous exposition of pictures. There were two different sessions. In the first, the presented tones demanded no further cognitive activity from the subjects (passive or "ignore" session), while in the second session subjects were instructed to count the tones (active or "count" session). The central question was whether inter-modal influences of visual stimulation in the active condition would modulate the auditory P3 in the same way as in the passive condition. Brain responses in the ignore session revealed only a small P3-like component over the parietal and frontal cortex, however, when the auditory stimuli co-occurred with the visual stimuli, an increased frontal activity in the window of 300-500 ms was observed. This could be interpreted as the reflection of a more intensive involuntary attention shift, provoked by the preceding visual stimulation. Moreover, it was found that cognitive load caused by the count instruction, resulted in an evident P3, with maximal amplitude over parietal locations. This effect was smaller when auditory stimuli were presented on the visual background. These findings might support the thesis that available resources were assigned to the analysis of visual stimulus, and thus were not available to analyze the subsequent auditory stimuli. This reduction in allocation of resources for attention was restricted to the active condition only, when the matching of a template with incoming information results in a distinct P3 component. It is discussed whether the putative source of this effect is a change in the activity of the frontal cortex. pl
dc.subject.en ERP pl
dc.subject.en P3 pl
dc.subject.en cross-modal attention pl
dc.subject.en attentional resources pl
dc.subject.en auditory modality pl
dc.subject.en visual modality pl
dc.description.volume 67 pl
dc.description.number 2 pl
dc.identifier.eissn 1689-0035 pl
dc.title.journal Acta Neurobiologiae Experimentalis pl
dc.language.container eng pl
dc.date.accession 2015-08-31 pl
dc.affiliation Wydział Filozoficzny : Instytut Psychologii pl
dc.subtype Article pl
dc.rights.original OTHER; otwarte czasopismo; ostateczna wersja wydawcy; w momencie opublikowania; 0; pl

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