common recognized symptom is loss of memory. When a physician or doctor has been notified, and is suspected, diagnosis is usually confirmed with a behavioral assessment and cognitive tests.

Bodily functions are gradually lost and leading ultimately to death. The individual prognosis for indeterminate period time period before fully becoming apparent, it can also progress undiagnosed for the years. The mean life expectancy is diagnosis following approximately 7 years.

Progression and cause of Alzheimer's disease in not well understood. Some researches have indicted that disease is associated with tangles and plaques in brain. Some measures have also suggested for prevention of Alzheimer's disease, and its value is unproven in slowing course and reducing severity of disease.

Its first symptoms are mistaken as related ageing or stress. Neuropsychological tests can reveal the mild cognitive difficulties up to 8 years before the person fulfills clinical criteria for AD diagnosis.

These early symptoms can also affect most complex daily living activities. Most noticeable deficit is the memory loss that shows up as recent difficulty in remembering learned inability and facts to acquire some new information. In small proportion of them, language's difficulties, executive functions, execution of movements or perception are more prominent than the memory problems. The progressive deteriorations eventually hinder independence, writing and reading skills are also lost progressively.