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Related Concept Videos

Parkinson's Disease: Overview01:15

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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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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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Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
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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: Feb 25, 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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Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking

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Parkinson's disease and dementia.

A Padovani1, C Costanzi, N Gilberti

  • 1Department Medical and Surgical Sciences, Institute of Neurology, University of Brescia, P.zza Spedali Civili 1, I-25125 Brescia, Italy. padovani@med.unibs.it

Neurological Sciences : Official Journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology
|May 19, 2006
PubMed
Summary

Parkinson's disease (PD) is a common neurodegenerative disorder. Dementia affects 40% of PD patients, often presenting as dysexecutive and visuospatial deficits, suggesting shared pathology with Lewy body dementia.

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Characterizing the Relationship Between Eye Movement Parameters and Cognitive Functions in Non-demented Parkinson's Disease Patients with Eye Tracking
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Area of Science:

  • Neurology
  • Neuroscience
  • Geriatrics

Background:

  • Parkinson's disease (PD) affects 1% of individuals over 60.
  • Non-motor symptoms significantly impact PD patients and caregivers.
  • Dementia is a prevalent comorbidity in PD.

Purpose of the Study:

  • To summarize the prevalence and characteristics of dementia in Parkinson's disease.
  • To explore the relationship between Parkinson's disease dementia (PDD) and dementia with Lewy bodies (DLB).

Main Methods:

  • Literature review and synthesis of existing research on PD and dementia.
  • Analysis of epidemiological data regarding dementia prevalence in PD patients.
  • Comparison of clinical and neuropathological features of PDD and DLB.

Main Results:

  • Approximately 40% of Parkinson's disease patients develop dementia.
  • PDD typically manifests as dysexecutive and visuospatial impairments, with relative sparing of memory.
  • The risk of dementia is six times higher in PD patients compared to age-matched controls.

Conclusions:

  • Dementia is a major non-motor complication of Parkinson's disease.
  • PDD and DLB share significant clinical and pathological similarities, suggesting common underlying mechanisms.
  • Understanding these overlaps is crucial for diagnosis and management.