Correlations between FA value and PM score in each cluster and comparison with normal subjects. Significant correlations between FA value and PM score were found in (A) the left parahippocampal gyrus (r = 0.89), (B) left inferior parietal lobe (r = 0.93), and (C) left anterior cingulate (r = 0.90). FA values of DAI subjects with full PM score (score = 6) were preserved compared with those of normal volunteers in each cluster (D: left parahippocampal gyrus, E: left inferior parietal lobe, F: left anterior cingulate cortex). (Rt: right, Lt: left, FA: fractional anisotropy, PM: prospective memory, PH: parahippocampal gyrus, IPL: inferior parietal lobe, ACC: anterior cingulate cortex, n.s.: not significant).