Measure of integrity and percentages of involvement in the activation of WM bundles for the three groups.

<p>The percentages over 5% in at least one group are reported. For each group, the percentages of involvement were computed superimposing the <i>ensemble</i> tract to the atlases of the WM fiber bundles and represent the number of overlapping voxels between the two, with respect to the number of voxels of the atlas. Abbreviations: WM = white matter; HC = healthy controls; aMCI = amnestic mild cognitive impairment; AD = Alzheimer's disease; FA = fractional anisotropy; SD = standard deviation; CB = cingulum bundle; AF = arcuate fasciculus; CC = corpus callosum; sup = superior; par = parietal; post = posterior; temp = temporal.</p><p>(*)The average FA was found to be significantly different between AD and HC (p<0.05 corrected for multiple comparisons).</p><p>(#)The average FA was found to be significantly different between aMCI and AD (p<0.05 corrected for multiple comparisons).