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Today's Globe: stroke exercise, Alzheimer's protein, salmonella

Posted by Elizabeth Cooney August 29, 2008 06:55 AM

Walking on a treadmill three times a week helped stroke survivors improve their mobility and physical conditioning but also led to a "rewiring" of the brain reflecting these gains, US researchers said yesterday.

Scientists for the first time have peered into people's brains to directly measure the ebb and flow of a substance notorious for its role in Alzheimer's disease.

The federal government said yesterday the salmonella outbreak that sickened at least 1,440 people appears to be over, but its ultimate source may never be known, partly because of shortcomings in the nation's food safety system.

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Elizabeth Cooney covers health for the Worcester Telegram & Gazette. She previously reported on business and was an editor at the paper. Earlier in her career, she edited medical books and journals at Little, Brown, and worked for Boston magazine.

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