Alzheimer's disease
passes by various phases, which in eight
to twelve years will lead to death.
Four phases classically are described: the light
phase , the moderated phase, the severe phase
and the final phase.
Various
categories of Alzheimer's disease
The most widespread form is the not
hereditary sporadic form. It relates to
99 % of cases. The other, very
rare, is the family or hereditary form.
Pathological modifications in the brain
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