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Regional activation during encoding of items in the Encoding Memory Task (top left), illustrating the significant interaction between regional activation and APOE genotype in Parkinson’s disease patients (see text for details). The y-axes represent the mean parameter estimate, in arbitrary scaled units. Post hoc t-test analysis indicated that region of interest and APOE genotype interaction occurred at marked areas (bottom). *P < 0.05. TPO = temporo-parieto-occipital.
