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REM sleep disturbance signals future neurodegenerative disease

How many millions of people suffer from sleep disturbance? One sleep disorder in particular, called REM behavior disorder, could be a sign of impending neurodegenerative disease, including Parkinson's and dementia, say scientists. In order to gauge the relationship between the REM sleep disorder and neurodegeneration, scientists performed molecular neuroimaging using a technique called single photon emission computed tomography (SPECT), which allows clinicians to evaluate bodily functions instead of focusing on structure, the forte of conventional radiology.
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