The late life dementias are often characterized by the names of the proteins that accumulate.
Lewy body dementia
is also known as a synucleinopathy because the protein
that builds up is called synuclein. When synuclein forms clumps, those clumps are called lewy bodies
. There is no genetic test for lewy body disease. The cause is unknown. Lewy bodies in the brainstem cause parkinson's.