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fMRI results. Brain activations for control subjects and PPA patients specific for the semantic task (SYN–LETTERS contrast). Both groups showed similar left-lateralized patterns of activation in inferior frontal gyrus, temporoparietal cortex, and anterior cingulate/supplementary motor cortex (not pictured). Also shown is brain activation for PPA > controls for the SYN–LETTERS contrast in left premotor cortex. Activations shown are significant at p > 0.05, corrected.
