Senile dementia Alzheimer's type (SDAT) is the most common cause of intellectual decline with aging. The incidence is approximately nine out of ten thousand people and it affects women more often than men, occurring primarily in older people.

The cause is unknown but several factors are believed to be involved in the development of the disorder although none have yet been proven. The neurochemical factors include lack of substances used by the nerve cells

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The onset of the disorder in a person is characterized by impaired memory with progressive loss of intellectual function. There might appear mood changes, changes in language capability, changes in way of walking and other changes as the disorder progresses. There is a decrease in the size of the tissues of the brain, enlargement of the ventricles and deposits within the tissues of the brain.

to transmit nerotransmitters, including acetylcholine, somatostatin and norepinephrine. Environmental factors include exposure to aluminum, manganese, and other substances. The infectious factors include virus like organisms called prion infections that affect the central nervous system. In some families (representing 5 to

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Alzheimer's Disease, factors include, tissues brain, development disorder, control aggressive, senile dementia,
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