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  Steady-state responses in MEG demonstrate information integration within but not across the auditory and visual senses

Giani, A., Ortiz, E., Belardinelli, P., Kleiner, M., Preissl, H., & Noppeney, U. (2012). Steady-state responses in MEG demonstrate information integration within but not across the auditory and visual senses. NeuroImage, 60(2), 1478-1489. doi:10.1016/j.neuroimage.2012.01.114.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-B7DC-4 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-10EB-0
Genre: Journal Article

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Giani, AS1, 2, Author              
Ortiz, EB, Author
Belardinelli, P, Author
Kleiner, M2, 3, 4, Author              
Preissl, H, Author              
Noppeney, U1, 2, Author              
Affiliations:
1Research Group Cognitive Neuroimaging, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497804              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              
3Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
4Project group: Cognitive Engineering, Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_2528702              

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 Abstract: To form a unified percept of our environment, the human brain integrates information within and across the senses. This MEG study investigated interactions within and between sensory modalities using a frequency analysis of steady-state responses that are elicited time-locked to periodically modulated stimuli. Critically, in the frequency domain, interactions between sensory signals are indexed by crossmodulation terms (i.e. the sums and differences of the fundamental frequencies). The 3x2 factorial design, manipulated (1) modality: auditory, visual or audiovisual (2) steady-state modulation: the auditory and visual signals were modulated only in one sensory feature (e.g. visual gratings modulated in luminance at 6 Hz) or in two features (e.g. tones modulated in frequency at 40 Hz amplitude at 0.2 Hz). This design enabled us to investigate crossmodulation frequencies that are elicited when two stimulus features are modulated concurrently (i) in one sensory modality or (ii) in auditory and visual modalities. In support of within-modality integration, we reliably identified crossmodulation frequencies when two stimulus features in one sensory modality were modulated at different frequencies. In contrast, no crossmodulation frequencies were identified when information needed to be combined from auditory and visual modalities. The absence of audiovisual crossmodulation frequencies suggests that the previously reported audiovisual interactions in primary sensory areas may mediate low level spatiotemporal coincidence detection that is prominent for stimulus transients but less relevant for sustained SSR responses. In conclusion, our results indicate that information in SSRs is integrated over multiple time scales within but not across sensory modalities at the primary cortical level.

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 Dates: 2012-04
 Publication Status: Published in print
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 Rev. Method: -
 Identifiers: DOI: 10.1016/j.neuroimage.2012.01.114
BibTex Citekey: GianiOBKPN2012
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Title: NeuroImage
Source Genre: Journal
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Publ. Info: Orlando, FL : Academic Press
Pages: - Volume / Issue: 60 (2) Sequence Number: - Start / End Page: 1478 - 1489 Identifier: ISSN: 1053-8119
CoNE: https://pure.mpg.de/cone/journals/resource/954922650166