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UCLA researchers image earliest signs of Alzheimer's, before symptoms appear
Date:1/28/2010

y. Here, the researchers looked at 10 cognitively normal elderly subjects who remained normal at three-year and six-year follow-ups, and at seven cognitively normal elderly subjects who were diagnosed with MCI between two and three years after their initial brain scan and with Alzheimer's approximately seven years after the initial scan.

Again, excessive atrophy in the CA1 and subicular regions was present in cognitively normal individuals who went on to be diagnosed with MCI, and a slow progression of atrophy beyond the CA1 and subiculum to other regions was evident in those ultimately diagnosed with Alzheimer's.

Apostolova noted that the degree of atrophy is not easily visible in the brain scans and that very sensitive techniques are required to show its progression.

"We can't see the pathologic changes, but we clearly see the neurodegenerative atrophy associated with MCI and AD, and how it spreads through the hippocampus," she said. "This is exactly what a biomarker, being an indirect measure of disease progression, is supposed to do."


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Contact: Mark Wheeler
mwheeler@mednet.ucla.edu
310-794-2265
University of California - Los Angeles
Source:Eurekalert

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