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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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Giani, A1, 2, 3, Autor           
Erick, O, Autor
Belardinelli , P, Autor
Kleiner, M2, 3, 4, Autor           
Preissl, H, Autor           
Noppeney, U1, 3, Autor           
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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 Zusammenfassung: 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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 Datum: 2011-10
 Publikationsstatus: Erschienen
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 Identifikatoren: BibTex Citekey: GianiEBKPN2011
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Veranstaltung

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Titel: 12th Conference of Junior Neuroscientists of Tübingen (NeNA 2011)
Veranstaltungsort: Heiligkreuztal, Germany
Start-/Enddatum: 2011-10-10 - 2011-10-12

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Titel: 12th Conference of Junior Neuroscientists of Tübingen (NeNA 2011)
Genre der Quelle: Konferenzband
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Seiten: - Band / Heft: - Artikelnummer: - Start- / Endseite: 27 Identifikator: -