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[Parkinson disease and cognition].

J Kulisevsky1, B Pascual-Sedano

  • 1Sección de Trastornos del Movimiento, Hospital de la Santa Creu i Sant Pau, Barcelona.

Neurologia (Barcelona, Spain)
|June 23, 1999
PubMed
Summary

Parkinson's Disease (PD) often causes cognitive deficits, including dementia in 15-25% of patients. While dopamine replacement helps, cognitive improvements in PD are incomplete, suggesting other factors are involved.

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Area of Science:

  • Neuroscience
  • Cognitive Neurology
  • Movement Disorders

Context:

  • Parkinson's Disease (PD) is a neurodegenerative disorder primarily affecting motor function.
  • Cognitive deficits are common in PD, ranging from mild impairments to global dementia.
  • The dopaminergic hypothesis explains some cognitive alterations, but incomplete treatment response suggests broader mechanisms.

Purpose:

  • To review the spectrum of cognitive deficits in Parkinson's Disease.
  • To explore the role of dopaminergic and non-dopaminergic systems in PD-related cognitive impairment.
  • To discuss the prevalence and potential overlap between depression and dementia in PD.

Summary:

  • Cognitive impairments in PD affect executive functions, working memory, visuospatial skills, and attention.
  • Dementia prevalence in PD is estimated at 15-25%, with pathological hallmarks potentially resembling Alzheimer's disease.
  • Subcortical alterations, such as dopaminergic neuron loss, can cause severe cognitive impairment.
  • The relationship between depression and dementia in PD requires further investigation, as depressed PD patients exhibit poorer neuropsychological performance.

Impact:

  • Highlights the significant burden of cognitive dysfunction in Parkinson's Disease.
  • Underscores the need for research into non-dopaminergic pathways for cognitive enhancement in PD.
  • Emphasizes the importance of understanding the interplay between depression and cognitive decline in PD management.

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