Paper Info
Title
MEG-fMRI integration to visualize brain dynamics while perceiving 3-D object shape from motion.
Abstract
Here, we combine magnetoencephalography (MEG) and functional magnetic resonance imaging (fMRI) to detect the dynamic brain responses to 3D-SFM. We manipulated the coherence of randomly moving dots to create different levels of 3D perception and investigated the associated changes in brain activity. Results of the fMRI analysis were used to impose plausible constraints on the MEG inverse calculation to improve spatial resolution of the spatiotemporal activity estimates. Time-frequency analysis was also employed to elucidate spatiotemporal dynamic changes in the spontaneous brain activities. MEG-fMRI combined analysis showed that the activities the posterior infero-temporal (pIT), parieto-occipital (PO), and intra-parietal (IP) regions were increased at different latencies during highly coherent motion conditions in which subjects perceived a robust 3D object. Results of the time-frequency analysis indicated the suppression of alpha- and beta-band activities in these regions which reflect the commitment of these areas in the perception of 3D-SFM. Current results suggest that the interactions between the dorsal and ventral visual subsystems are crucial for the perception of 3D object from 2D optic flow.
Year
DOI
Venue
2011
10.1109/IEMBS.2011.6091218
EMBC
Keywords
Field
DocType
ventral visual subsystem,3d object shape perception,3d-sfm perception,2d optic flow,posterior infero-temporal region,brain activity,spatiotemporal activity,alpha-band activity,meg inverse calculation,image resolution,dynamic brain responses,spatial resolution,spatiotemporal phenomena,coherent motion condition,dorsal visual subsystem,robust 3d object. perception,fmri analysis,parieto-occipital region,biomedical mri,functional magnetic resonance imaging,data visualisation,beta-band activity,spatiotemporal dynamics,brain dynamics visualization,magnetoencephalography,medical image processing,intraparietal region,meg-fmri integration,time-frequency analysis,image motion analysis,optical flow,time frequency analysis,three dimensional,visualization,motion perception,form perception,magnetic resonance imaging,coherence,systems integration
Computer vision,Visual cortex,Functional magnetic resonance imaging,Computer science,Motion perception,Brain activity and meditation,Coherence (physics),Artificial intelligence,Perception,Form perception,Magnetoencephalography
Conference
Volume
ISSN
ISBN
2011
1557-170X
978-1-4244-4122-8
Citations 
PageRank 
References 
0
0.34
0
Authors
3
Name
Order
Citations
PageRank
Sunao Iwaki101.35
Giorgio Bonmassar215933.51
John W Belliveau300.34