Alzheimer’s disease is defined as the degenerative disease of the brain resulting in progressive memory loss, impaired thinking, deterioration, and changes in personality and mood . It includes deterioration of language, comprehension, memory, and thinking and learning capability . The term Alzheimer was first coined by a German physician, Alios Alzheimer, in 1915 . The WHO mentioned Alzheimer’s disease as the most common cause of dementia; however, not all dementia is a result of Alzheimer’s . Alzheimer’s is becoming a growing burden and the leading cause of disability among older people, and there is no cure for it . It is set to be the biggest killer among the growing elderly population.
Alzheimer’s disease worsens over time . It is a progressive disease, where dementia symptoms gradually worsen over a number of years. In its early stages, memory loss is mild, but with late-stage Alzheimer’s disease, individuals lose the ability to carry on a conversation and respond to their environment . Those with Alzheimer’s disease live an average of eight years after their symptoms become noticeable to others, but survival can range from 4 to 20 years, depending on age and other health conditions.