Polygons are many-sided figures, with sides that are line segments. Polygons are named according to the number of sides and angles they have. The most familiar polygons are the triangle, the rectangle, and the square. A regular polygon is one that has equal sides.
For information about Memory Disorder Clinics and the Florida Brain Bank, see Clinical Evaluation and Research. It is very rare to show signs of dementia before age 40, however the youngest person ever diagnosed with Alzheimerâs was 27 years of age. Alzheimerâs and Downâs Syndrome are both on chromosome 21, and patients who have Downâs Syndrome invariably develop Alzheimerâs if they live long enough.
It is rare in people under age 60. The risk of dementia increases as a person gets older. Most types of dementia are nonreversible (degenerative). Nonreversible means the changes in the brain that are causing the dementia cannot be stopped or turned back. Alzheimer's disease is the most common type of dementia. Lewy body disease is a leading cause of dementia the elderly. People with this condition have abnormal protein structures in certain areas of the brain. Dementia also can be due to many small strokes.