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Lena Ting of Emory University and her team set out to understand how aging and Parkinson's disease affect the way the brain and muscles respond when a person tries to regain balance.
In earlier experiments, the researchers studied young adults by suddenly destabilizing them, essentially pulling a rug out from under their feet. This triggered a rapid, automatic reaction involving the brainstem and muscles. When the balance challenge was more severe, a second wa...
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