The main effect of verbal fluency task in HC (n = 14), subjects with aMCI (n = 15) and AD (n = 14), who completed the fMRI assessments.

One sample t-test with cluster correction (Z>2.3), significance threshold of p = 0.05. X, Y, Z coordinates expressed in millimiters.
Abbreviations: Sup  =  superior; Inf  =  inferior; Mid  =  middle; R  =  right; L  =  left; Gy  =  gyrus; SMA  =  supplementary motor area; BA  =  Brodmann area; HC  =  healthy controls; aMCI  =  amnestic mild cognitive impairment; AD  =  Alzheimer's disease.