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Although Parkinson’s disease and Alzheimer’s disease are both common neurodegenerative disorders, their underlying biology, cognitive symptoms, and biomarker profiles differ in important ways. Understanding these distinctions helps clinicians better diagnose, monitor, and treat each condition, and sheds light on why patients experience such different symptoms. Dr. Jonathan Isaacson explains that “Parkinson’s Disease and Alzheimer’s disease…

For decades, clinicians have relied primarily on expert observation, detailed histories, and the slow passage of time to diagnose Parkinson’s disease and related parkinsonian disorders. Yet these conditions often look remarkably similar in their early stages, making accurate diagnosis challenging, and in many cases, delayed. Today, a new wave of diagnostic innovation is emerging, and…