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Functional neuroimaging studies can be performed by combining the modalities of fMRI and Electroencephalography because of their complementary properties. The main advantage of EEG imaging among other modalities is the high temporal resolution while fMRI has high spatial resolution. So, usage of these procedures is going to help us to gain more information about the functional organization of the brain. In this study, changes in the relationship between Steady State Visual Evoked Potentials (SSVEP) generators and BOLD responses during visual stimulation have been systematically studied with 5 stimulus presentation rates (2, 4, 6, 8, 10) between 2-10 Hz. fMRI Analysis was carried out using Statistical Parametric Mapping (SPM). The result of fMRI analysis is used as a localization mask for SSVEP localization process. SSVEP generators are localized using Low Resolution Electro Magnetic Tomography (LORETA) which is implemented on a realistic head model. Then, for each stimulus frequency voxel by voxel correlation values of the active regions are computed.

Original publication

DOI

10.1109/IEMBS.2007.4353523

Type

Journal article

Journal

Conf Proc IEEE Eng Med Biol Soc

Publication Date

2007

Volume

2007

Pages

5239 - 5242

Keywords

Algorithms, Artificial Intelligence, Brain Mapping, Computer Simulation, Data Interpretation, Statistical, Evoked Potentials, Visual, Head, Humans, Magnetic Resonance Imaging, Models, Neurological, Pattern Recognition, Automated, Tomography, Visual Cortex