Abstract
Alzheimer's disease is the first most common neurodegenerative disease of the brain. The etiology of Alzheimer's disease is still unknown, but some experts believe that it is the result of genetic and environmental factors (cf.
Mayeux & Stern, 2012; Ravaglia et al., 2005). At the same time, we encounter characteristic and neuropathological and neurochemical features in etiology.
According to several studies, this degenerative disease begins to emerge twenty years before the symptoms themselves appear (cf. Villemagne et al., 2013; Reiman et al., 2012; Alzheimer's Association, 2019).
This occurrence is recorded through small changes in the brain that are imperceptible to the affected person. Subsequently, after several years of brain changes, individuals develop noticeable symptoms such as phatic disorder and practice disorder.