Parkinson’s disease beyond motor symptoms: a review of the validity and limitations of current classification of non-motor symptoms - Takeaways - MDSpire
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Exploring Non-Motor Symptoms in Parkinson's Disease: An Evaluation of Existing Classification Systems and Their Limitations

  • By

  • Asad Makhani

  • Tiago A. Mestre

  • Anne-Mary Abe

  • June 8, 2026

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  • 1

    Non-motor symptoms (NMS) in Parkinson's disease (PD) are prevalent and significantly affect quality of life for patients and caregivers.

  • 2

    Current classification systems for NMS in PD inadequately capture the complexity and interrelationship of these symptoms.

  • 3

    NMS can emerge at different stages of PD, with some symptoms appearing before motor symptoms and others becoming prominent later.

  • 4

    Hyposmia is a key NMS that can occur up to four years before motor symptoms and is present in up to 90% of PD patients.

  • 5

    Depression affects about 40% of PD patients and is associated with reduced quality of life across all stages of the disease.

Original Source(s)

Parkinson’s disease beyond motor symptoms: a review of the validity and limitations of current classification of non-motor symptoms

  • by Asad Makhani, Tiago A. Mestre, Anne-Mary Abe

  • June 8, 2026

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