3 questions on "Using fMRI to examine activity relationships between brain areas"

Explain psychophysiological interaction (PPI)
Uses the time course of activity in one seed region to predict changes in activity in another region
Explain what structural equation modeling is
Incorporating known anatomical connecting comparing models with different hypothesised set of directional influences.
Explain dynamic causal modelling
Functional connections between brain regions and then evaluates how that connectivity changes as a result of experimental manipulations
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