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Related Concept Videos

Dementia01:30

Dementia

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Dementia is a collective term for cognitive disorders primarily affecting memory, thinking, and reasoning. It is not a specific disease but a syndrome, with Alzheimer's disease being the most common cause, accounting for approximately 60-80% of cases. Other types include vascular dementia, Lewy body dementia, and frontotemporal dementia. Dementia affects millions worldwide, particularly older adults, though it is not a normal part of aging.
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Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
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Neurodegenerative disorders, such as Parkinson's Disease (PD), involve the gradual and irreversible destruction of neurons in particular brain areas. These disorders exhibit standard features like proteinopathies, selective vulnerability of some neurons, and an interaction of intrinsic properties, genetics, and environmental influences in neural injury.
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Alzheimer's Disease (AD) is a continually advancing neurodegenerative disorder, distinguished by escalating memory loss, cognitive dysfunction, and dementia. The disease unfolds in three stages: preclinical, mild cognitive impairment (MCI), and dementia. Its onset is insidious, and the progression gradual, with the cause not well explained by other disorders.
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Related Experiment Video

Updated: Mar 11, 2026

Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
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Dementia Predictors in Parkinson Disease: A Validation Study.

Julius B M Anang1, Takashi Nomura2, Silvia Rios Romenets1

  • 1Department of Neurology and Neurosurgery, McGill University, Montreal, QC, Canada.

Journal of Parkinson'S Disease
|December 3, 2016
PubMed
Summary

Researchers validated 8 clinical predictors for dementia in Parkinson's disease. Five predictors, including REM sleep behavior disorder (RBD) and mild cognitive impairment (MCI), were confirmed, with their combination being the strongest dementia indicator.

Keywords:
DementiaREM sleep behavior disordermild cognitive impairmentprediction

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Area of Science:

  • Neurology
  • Neuroscience
  • Clinical Medicine

Background:

  • Parkinson's disease (PD) is a neurodegenerative disorder frequently associated with cognitive decline.
  • Dementia is a common and debilitating complication in Parkinson's disease.
  • Identifying early predictors of dementia in PD is crucial for timely intervention and management.

Purpose of the Study:

  • To validate previously identified clinical predictors of dementia in Parkinson's disease.
  • To assess the predictive value of specific clinical variables in independent prospective cohorts.

Main Methods:

  • Prospective validation study utilizing two independent cohorts (n=134).
  • Follow-up duration of 3.6 years.
  • Statistical analysis to determine the association of baseline variables with dementia development.

Main Results:

  • Five of the eight previously identified clinical predictors were significantly associated with dementia in the validation cohort.
  • Confirmed predictors include age, male sex, baseline REM sleep behavior disorder (RBD), orthostatic hypotension, and mild cognitive impairment (MCI).
  • The combination of RBD, MCI, and orthostatic hypotension at baseline emerged as the strongest determinant for dementia development across all cohorts.

Conclusions:

  • The study validates key clinical predictors for dementia in Parkinson's disease.
  • Early identification of specific clinical signs like RBD, MCI, and orthostatic hypotension can aid in predicting dementia risk.
  • These validated predictors can inform clinical practice and future research for managing cognitive decline in PD.