Bilingualism may delay Alzheimer's Disease

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Interesting little story in the Star today:
Bilingualism could delay Alzheimer’s symptoms.

Bilingual speakers can delay the onset of Alzheimer’s disease and its symptoms for between four and five years…

In a soon to be published study three researchers… found in a study of more than 100 bilingual patients and 100 monolingual patients that the bilinguals experienced the onset of symptoms and were diagnosed with Alzheimer’s disease between four and five years later than monolingual patients.

Seems the extra brain activity associated with switching languages provides a reserve of capability against the depletion of Alzheimer’s.