Washington: The blockage of a tiny blood vessel in the brain can alter behaviour, even bringing on dementia and Alzheimer`s in the long run, says a new finding."I am afraid that tiny strokes in our patients contribute -- over the long term -- to illness such as dementia and Alzheimer`s," said Patrick D. Lyden, study co-author and head of neurology, Cedars-Sinai Medical Centre in Los Angeles."This data shows us, for the first time, that even a tiny stroke can lead to disability. Better tools will be required to tell whether human patients suffer memory effects from the smallest strokes," added Lyden, the journal Nature Neuroscience reports."It was surprising that blocking one small vessel could have a discernable impact on the behaviour of a rat," said Andy Y. Shih, who completed this work as a postdoctoral fellow in physics at the University of California, San Diego.
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