Abstract
Brain activity can be measured with several non-invasive neuroimaging modalities, but each modality has inherent limitations with respect to resolution, contrast and interpretability. It is hoped that multimodal integration will address these limitations by using the complementary features of already available data. However, purely statistical integration can prove problematic owing to the disparate signal sources. As an alternative, we propose here an advanced neural population model implemented on an anatomically sound cortical mesh with freely adjustable connectivity, which features proper signal expression through a realistic head model for the electroencephalogram (EEG), as well as a haemodynamic model for functional magnetic resonance imaging based on blood oxygen level dependent contrast (fMRI BOLD). It hence allows simultaneous and realistic predictions of EEG and fMRI BOLD from the same underlying model of neural activity. As proof of principle, we investigate here the influence on simulated brain activity of strengthening visual connectivity. In the future we plan to fit multimodal data with this neural population model. This promises novel, model-based insights into the brain's activity in sleep, rest and task conditions.
Original language | English |
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Pages (from-to) | 3785-3801 |
Number of pages | 17 |
Journal | Philosophical Transactions of The Royal Society A Mathematical Physical and Engineering Sciences |
Volume | 369 |
Issue number | 1952 |
DOIs | |
Publication status | Published - 1 Oct 2011 |
Keywords
- cortical connectivity
- neural population model
- brain dynamics
- mean-field model
- multimodal integration
- simultaneous EEG and fMRI BOLD