The density of p-MAPT staining in the fornix and all the basal forebrain structures demonstrated significant correlation with the Braak stage of neurofibrillary degeneration, compatible with the progressive spread of tauopathy to these structures as AD neurofibrillary degeneration advances along the regional pattern described by Braak and Braak [2–4]. Here, MAPT is linked to Alzheimer disease.