MAPT and tauopathy: In the mammillary body, there was a significant correlation between p-MAPT neuropathology in the fornix and overall neuronal and astroglial p-MAPT neuropathology (Fig. 8c), however, there was no significant correlation with neuronal tauopathy alone (n = 37; R = 0.327, p = 0.288) and only a trend towards correlation with astroglial tauopathy alone (n = 37; R = 0.421, p = 0.057) in our cohort.