Nerve fibres and coiled bodies were the only tau deposits in the corpus callosum following inoculation of homogenates from AD, primary age-related tauopathy (PART), ARTAG, GGT, PSP, Pick’s disease (PiD), and frontotemporal lobar degeneration linked to MAPT P301L mutation (FTLD-P301L) [36]. This evidence concerns the gene MAPT and Alzheimer disease.