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The World Smells Different in Parkinsons Disease

2026-02-24 neurology Title + abstract only
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Olfactory decline is a well-established aspect of Parkinsons disease (PD) and is considered one of its earliest signs, often preceding motor symptoms by years to decades. However, because olfactory impairment is also common in healthy aging and other medical conditions, current olfactory tests that score performance (odor detection, discrimination, and identification) lack disease specificity. In contrast to performance scores, olfactory perceptual fingerprints are derived from odor ratings and ...

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