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Subjects at risk of Alzheimer's may now be able to delay the onset of their first symptoms
Date:3/23/2011

, are ten times more likely to develop Alzheimer's disease".

The training program that was used was designed to help elderly subjects with MCI develop strategies, such as the use of mnemonics, for example, and promote encoding and retrieval, such as word lists, for example, using alternative areas of the brain. "The hypothesis had already been raised, but our team was the first to provide scientific support, using a functional neuroimaging protocol", added Sylvie Belleville.

Researchers worked with thirty elderly subjects: 15 healthy adults and 15 with MCI. Magnetic resonance imaging was used to analyse brain activity in the two groups 6 weeks prior to memory training, one week prior to training and one week after training. Before the memory training, magnetic resonance imaging in both the healthy elderly subjects and those with MCI showed activation in areas of the brain traditionally associated with memory. As expected, decreased activation was observed in subjects with MCI. After training, brain areas in elderly subjects with MCI showed increased activation in areas typically associated with memory, but also in new areas of the brain usually associated with language processing, spatial and object memory and skill learning.

According to Dr. Belleville: "Analysis of brain activity during encoding as measured before and after the training program, indicates that increased post-training activation in the right inferior parietal gyrus is associated with post-intervention improvement. The healthy area of the brain has taken over for the area that is compromised."


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Contact: William Raillant-Clark
w.raillant-clark@umontreal.ca
514-343-7593
University of Montreal
Source:Eurekalert

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