In more than half CBD cases, the affected neurons and adjacent glial have been shownto be filled with a particular configuration of tauprotein.27 The remainingcases have shown tau deposition more closely resembling that ofPSP, Alzheimer pathology, or nonspecific cell loss with replacementgliosis.27 There are noballooned neurons on the PSP.31According to previous studies,17,32,33 the pathology is present throughout frontal, parietal, andtemporal cortical regions as well as the hippocampus, basal ganglia, and substantianigra. This evidence concerns the gene MAPT and red-green color blindness.