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Experimental Brain Research

, Volume 166, Issue 3–4, pp 411–426 | Cite as

Multisensory processing and oscillatory gamma responses: effects of spatial selective attention

  • Daniel Senkowski
  • Durk Talsma
  • Christoph S. Herrmann
  • Marty G. WoldorffEmail author
Research Article

Abstract

Here we describe an EEG study investigating the interactions between multisensory (audio-visual) integration and spatial attention, using oscillatory gamma-band responses (GBRs). The results include a comparison with previously reported event-related potential (ERP) findings from the same paradigm. Unisensory-auditory (A), unisensory-visual (V), and multisensory (AV) stimuli were presented to the left and right hemispaces while subjects attended to a designated side to detect deviant target stimuli in either sensory modality. For attended multisensory stimuli we observed larger evoked GBRs approximately 40–50 ms post-stimulus over medial-frontal brain areas compared with those same multisensory stimuli when unattended. Further analysis indicated that the integration effect and its attentional enhancement may be caused in part by a stimulus-triggered phase resetting of ongoing gamma-band responses. Interestingly, no such early interaction effects (<90 ms) could be found in the ERP waveforms, suggesting that oscillatory GBRs may be more sensitive than ERPs to these early latency attention effects. Moreover, no GBR attention effects could be found for the unisensory auditory or unisensory visual stimuli, suggesting that attention particularly affects the integrative processing of audiovisual stimuli at these early latencies.

Keywords

Audiovisual Binding Bimodal EEG ERP 

Notes

Acknowledgements

We express our appreciation to Maren Grigutsch for software development and helpful comments on the manuscript and to Tineke Grent-’t Jong for her technical assistance. This study was supported by NIH grants R01 MH 64015 and P01 NS41328 (Project No. 2) to Marty Woldorff. Daniel Senkowski was funded by the German Research Foundation (DFG, grant HE3353/1) and the Max Planck Society.

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • Daniel Senkowski
    • 1
    • 2
    • 3
  • Durk Talsma
    • 1
    • 4
  • Christoph S. Herrmann
    • 5
  • Marty G. Woldorff
    • 1
    Email author
  1. 1.Center for Cognitive NeuroscienceDuke UniversityDurhamUSA
  2. 2.Max Planck Institute for Human Cognitive and Brain SciencesLeipzigGermany
  3. 3.Nathan Kline Institute for Psychiatric ResearchThe Cognitive Neurophysiology LaboratoryOrangeburgUSA
  4. 4.Clinical NeuropsychologyVrije Universiteit AmsterdamThe Netherlands
  5. 5.Institute for PsychologyOtto von Guericke University of MagdeburgGermany

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