Would you like to see your presentation here, made available to a global audience of researchers?
Add your own presentation or have us affordably record your next conference.
keywords:
cognitive architectures
cognitive neuroscience
computational neuroscience
computational modeling
fmri
Dynamic Causal Modeling is a widely-used method for examining brain connectivity. Most commonly, it is applied to brain regions showing strong responses to experimental tasks, comparing different network configurations based on the temporal dynamics of the neural signals. It can further be applied to models employing a theory-driven selection of brain regions, showing a weaker experimental effect. However, it is unclear if these effects provide sufficient temporal information for Dynamic Causal Modeling to reliably identify the best-fitting model. This study investigated the regional predictive fit in a theory-driven model which has been found to consistently outperform alternatives using Dynamic Causal Modeling. Results revealed issues with the fit of some regions and subjects, raising concerns regarding the reliability of model comparisons using Dynamic Causal Modeling with regions selected based on theory instead of a strong experimental effect.