Alzheimer's disease (AD) is a degenerative brain disease involving dysfunction and loss of nerve cells in the central nervous system, it was discovered by a German doctor, Dr. Alois Alzheimer in 1907. Accounted for 50 to 75% of all cases of dementia, it is the most common form of dementia (Blennow et al., 2006) and is known as a progressive neuropsychiatric disorder involving memory loss, mood swings, and of intellectual and social skills. skills (Lee et al., 2010) and the patient will progress through the seven stages of Alzheimer's, but at different rates (Reisberg et al., 2003). The prevalence of dementia increases exponentially with age from 60 to 85 years or older, that is