Name
Title | ||
|---|---|---|
Neural dynamics of 3-D object perception assessed by combined MEG/FMRI imaging technique |
Abstract | ||
|---|---|---|
Here, we used both the neuromagnetic (MEG) and the hemodynamic (fMRI) measures to visualize the spatiotemporal brain dynamics during 3-D structure perception from 2D motion (3D-SFM). The coherence of the random-dot motion stimuli was parametrically controlled to infer the changes of the brain dynamics corresponding to different 3-D percepts. The results of the fMRI analysis were used to impose plausible constraints on the MEG inverse calculation using the 'weighted' minimum-norm approach to improve spatial resolution of the spatiotemporal activity estimates. The inferior-temporal, the parieto-occipital, and the intraparietal regions showed increased neural activity in the highly coherent motion conditions in which subjects perceived robust 3-D object structure at different latencies. These results are in agreement with the previous fMRI studies and add further insight into the temporal dynamics of the neural activities in the multiple brain regions along both the dorsal and the ventral visual processing streams during 3D-SFM. |
Year | DOI | Venue |
|---|---|---|
2009 | 10.1109/ISBI.2009.5193019 | ISBI |
Keywords | Field | DocType |
coherent motion condition,previous fmri study,combined meg,neural dynamic,random-dot motion stimulus,fmri analysis,robust 3-d object structure,neural activity,fmri imaging technique,brain dynamic,3-d object perception,different 3-d percept,3-d structure perception,multiple brain region,neurophysiology,spatial resolution,imaging,surface reconstruction,coherence,meg,visual perception,dynamics,haemodynamics,brain imaging,magnetoencephalography | Computer vision,Dorsum,Visual processing,Neurophysiology,Pattern recognition,Computer science,Coherence (physics),Artificial intelligence,Stimulus (physiology),Perception,Visual perception,Magnetoencephalography | Conference |
Citations | PageRank | References |
0 | 0.34 | 0 |
Authors | ||
3 | ||
Name | Order | Citations | PageRank |
|---|---|---|---|
| Sunao Iwaki | 1 | 0 | 1.35 |
| Giorgio Bonmassar | 2 | 159 | 33.51 |
| John W Belliveau | 3 | 256 | 38.29 |