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.
Cortical dementia refers to dementia in which brain damage primarily affects the brain's cortex, or outer layer. Cortical dementias tend to cause problems with memory, language, thinking, and social behavior. Subcortical Dementia. Subcortical dementia is dementia that affects parts of the brain below the cortex. This dementia type tends to cause changes in emotions and movement in addition to problems with memory.