MAPT and Alzheimer disease: Tau+ TMN neurons were higher in those with AD vs. PSP (mean (SD), 24.23% (12.71%) vs. 9.83% (4.40%); p = 0.03). Tau+ LHA neurons were significantly higher in those with PSP vs. AD (mean (SD), 44.14% (18.35%) vs. 24.78% (10.38%); p = 0.03)