Neural modeling, functional brain imaging, and cognition

The richness and complexity of data sets acquired from PET or fMRI studies of human cognition have not been exploited until recently by computational neuronal modeling methods. In this article, two neural-modeling approaches for use with functional brain imaging data are described. One, which uses s tructural equation modeling, estimates the functional strengths of the anat omical connections between various brain regions during specific cognitive tasks. The second employs large-scale neural modeling to relate functional neuroimaging signals in multiple, interconnected brain regions to the under lying neurobiological time-varying activities in each region. Delayed match -to-sample (visual working memory for form) tasks are used to illustrate th ese models.