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Cortical Activities during Transparent Motion Perception: An FMRI-MEG Integration Study

  • Hiroaki Natsukawa
  • Tetsuo Kobayashi
Part of the IFMBE Proceedings book series (IFMBE, volume 37)

Abstract

To understand how specific brain areas asso ciated with transparent motion perception, neural activities during subjects performing a transparent motion perception task were measured by functional MRI (fMRI) and magne-toencephalography (MEG). An integrative fMRI-MEG me thod, in which the time-varying dipole moments of activated regions were reconstructed from measured MEGs, was applied to data acquired from both fMRI and MEG experiments. Sets of activated regions were determined by statistically analyzing fMRI data and used as spatial constraints for the integrative fMRI-MEG method. Dynamic recurrent neural activities in multiple cortical areas such as V1/V2, left and right intrapa-rietal sulci (IPS) could be successfully detected, suggesting that these three cortical areas play an important role for transpa rent motion perception. It may also reflect feed-forward and feed-back visual processes among different functional visual areas.

Keywords

Transparent motion MEG fMRI Source estimation Visual perception 

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Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • Hiroaki Natsukawa
    • 1
    • 2
  • Tetsuo Kobayashi
    • 1
  1. 1.Department of Electrical EngineeringKyoto UniversityKyotoJapan
  2. 2.The Japan Society for the Promotion of ScienceTokyoJapan

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