“…We selected nine regions of interest (ROIs) which were found to be involved in speech production (Xu et al, 2005 ; Hampson et al, 2006 ; Newman et al, 2013 ; Bourguignon, 2014 ; Christodoulou et al, 2014 ; Hirshorn et al, 2014 ; Helder et al, 2017 ) and reduced in MCI and AD pathology (Tondelli et al, 2012 ; Wang et al, 2015 ; Dicks et al, 2018 ; Verfaillie et al, 2018 ): the IFG (the sum of the pars opercularis, pars triangularis and pars orbitalis), the Middle Frontal Gyrus (MFG), the Precuneus (Prec), the IPL (the sum of the Angular Gyrus and the Supra Marginal Gyrus), the ITG, the MTG, the planum temporale in the STG, the FFG, and the Cereb. The volumes of these regions were extracted from FreeSurfer cortical segmentation statistical output.…”