Why some dementia patients lose ability to understand language

Greater buildup of a toxic protein found in Alzheimer’s disease on the left side of the brain can lead to a rare type of language dementia because of which people lose ability to express themselves and understand language, says a new study.

Using a special imaging technique, the scientists discovered the toxic build-up of amyloid protein is greater on the left side of the brain — the site of language processing — than on the right side in many individuals living with language dementia called primary progressive aphasia (PPA). Read more.