FTD constitutes 5-15% of all dementia cases and is the second most common cause of dementia for patients under the age of 65 [57](Rademakers et al., 2012). Unlike LOAD, FTD patients have relative preservation of memory; nonetheless, they experience progressive deterioration in language, behavior, and personality [57](Rademakers et al., 2012). The genetic background of FTD lies on two mutations respectively on the microtubules associated protein tau gene (MAPT) and progranulin (GRN) genes [57](Rademakers et al., 2012). DLB is yet another common type of dementia that is characterized by the presence of Lewy bodies in the brainstem, throughout the amygdala and cortex [75](Wu, 2011). Lewy bodies are composed of accumulated α-synuclein inside the nuclei of neurons [63](Shults, 2006).…