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Research article summary:
An analysis of audio-visual crossmodal integration by means of event-related potential (ERP) recordings.
Abstract Extract:
Crossmodal integration was studied in humans by presenting random sequences of auditory (brief noise bursts), visual (flashes), and audiovisual (simultaneous noise bursts and flashes) stimuli from a central location at irregular intervals between 600 and ... (Full abstract text below) Published 2002Jun
in Journal: Brain Res Cogn Brain Res
(Language : eng)
Full Pubmed Extract
This information was retrieved, real-time, on your behalf from the public area of the Pubmed website:
1. Brain Res Cogn Brain Res.
2002 Jun;14(1):106-14
An analysis of audio-visual crossmodal integration by means of event-related potential (ERP) recordings.
Teder-Sälejärvi WA, McDonald JJ, Di Russo F, Hillyard SA
Department of Neurosciences 0608, School of Medicine, University of California-San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0608, USA. wat@sdepl.ucsd.edu
Crossmodal integration was studied in humans by presenting random sequences of auditory (brief noise bursts), visual (flashes), and audiovisual (simultaneous noise bursts and flashes) stimuli from a central location at irregular intervals between 600 and 800 ms. The subjects' task was to press a button to infrequent and unpredictable (P=0.15) target stimuli that could be either a more intense noise burst, a brighter flash, or a combination of the two. In accordance with previous studies, behavioral data showed that bimodal target stimuli were responded to much faster and were identified more accurately than the unimodal target stimuli. The neural basis of this crossmodal interaction was investigated by subtracting the ERPs to the auditory (A) and the visual (V) stimuli alone from the ERP to the combined audiovisual (AV) stimuli (i.e. interaction=AV-(A+V)). Using this approach, we replicated previous reports of both early (at around 40 ms) and late (after 100 ms) ERP interaction effects. However, it appears that the very early interaction effects can be largely accounted for by an anticipatory ERP that precedes both the unimodal and bimodal stimuli. In calculating the ERP interaction this slow shift is subtracted twice, resulting in an apparent shift of the opposite polarity that may be confounded with actual crossmodal interactions.
PMID : 12063134 [PubMed - Indexed for MEDLINE]
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Full Author Information
| First Name | LastName | Initials |
| W A | Teder-Sälejärvi | WA |
| J J | McDonald | JJ |
| F | Di Russo | F |
| S A | Hillyard | SA |
Affiliation: Department of Neurosciences 0608, School of Medicine, University of California-San Diego, 9500 Gilman Drive, La Jolla, CA 92093-0608, USA. wat@sdepl.ucsd.edu
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Category links from this article:- Acoustic Stimulation - methods
- Adult
- Auditory Perception - physiology
- Evoked Potentials - physiology
- Female
- Humans
- Male
- Photic Stimulation - methods
- Visual Perception - physiology
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