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Bilingualism delays onset of Alzheimer's symptoms
Date:11/8/2010

Toronto, Canada A Canadian science team has found more dramatic evidence that speaking two languages can help delay the onset of Alzheimer's symptoms by as much as five years.

The latest study, led by Baycrest's Rotman Research Institute, examined the clinical records of more than 200 patients diagnosed with probable Alzheimer's disease and found that those who have spoken two or more languages consistently over many years experienced a delay in the onset of their symptoms by as much as five years. The study is published in the Nov. 9th issue of Neurology.

The science team includes internationally-renowned cognitive researcher Dr. Fergus Craik of the Rotman Research Institute; Dr. Ellen Bialystok of York University, a leading expert in bilingualism research; and Dr. Morris Freedman, one of Canada's leading clinicians in the diagnosis and treatment of Alzheimer's and other dementias.

"We are not claiming that bilingualism in any way prevents Alzheimer's or other dementias, but it may contribute to cognitive reserve in the brain which appears to delay the onset of Alzheimer's symptoms for quite some time," said Dr. Craik, lead investigator and co-editor of The Oxford Handbook of Memory.

The brains of people who speak two languages still show deterioration from Alzheimer's pathology; however, their special ability with two languages seems to equip them with compensatory skills to hold back the tell-tale symptoms of Alzheimer's, such as memory loss, confusion, and difficulties with problem-solving and planning.

"These results are especially important for multicultural societies like ours in Canada where bilingualism is common," said Dr. Bialystok, professor of Psychology at York University and associate scientist at the Rotman Research Institute. "We need to understand how bilingualism changes cognitive ability, especially when there are clinical implications as in this case."

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Contact: Kelly Connelly
kconnelly@baycrest.org
416-785-2432
Baycrest Centre for Geriatric Care
Source:Eurekalert

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