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

Giani, A., Erick, O., Belardinelli, P., Kleiner, M., Preissl, H., & Noppeney, U. (2011). Steady-state responses in MEG demonstrate information integration within but not across the auditory and visual senses. Poster presented at 12th Conference of Junior Neuroscientists of Tübingen (NeNA 2011), Heiligkreuztal, Germany.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0013-B9E6-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-10EA-1
Genre: Poster

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Giani, A1, 2, 3, Author              
Erick, O, Author
Belardinelli , P, Author
Kleiner, M2, 3, 4, Author              
Preissl, H, Author              
Noppeney, U1, 3, Author              
Affiliations:
1Research Group Cognitive Neuroimaging, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497804              
2Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497797              
3Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              
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-Ââstate responses (SSR) to periodic auditory and/or visual inputs. The 3x3 factorial design, manipulated (1) modality (auditory only, visual only and audiovisual) and (2) temporal dynamics (static, dynamic1 and dynamic2). In the static conditions, subjects were presented with (1) visual gratings, luminance modulated at 6Hz and/or (2) pure tones, frequency modulated at 40 Hz. To manipulate perceptual synchrony, we imposed additional slow modulations on the auditory and visual stimuli either at same (0.2 Hz = synchronous) or different frequencies (0.2 Hz vs. 0.7 Hz = asynchronous). This also enabled us to investigate the integration of two dynamic features within one sensory modality (e.g. a pure tone frequency modulated at 40Hz amplitude modulated at 0.2Hz) in the dynamic conditions. We reliably identified crossmodulation frequencies when these two stimulus features 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: 2011-10
 Publication Status: Published in print
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 Identifiers: BibTex Citekey: GianiEBKPN2011
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Title: 12th Conference of Junior Neuroscientists of Tübingen (NeNA 2011)
Place of Event: Heiligkreuztal, Germany
Start-/End Date: 2011-10-10 - 2011-10-12

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Title: 12th Conference of Junior Neuroscientists of Tübingen (NeNA 2011)
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 27 Identifier: -