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Related Concept Videos

Dementia01:30

Dementia

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.
The progression of dementia is generally gradual.
Dementia l: Introduction01:22

Dementia l: Introduction

Dementia is an acquired, progressive syndrome characterized by a decline in multiple cognitive domains severe enough to impair daily functioning and reduce independence. Although memory loss is a central feature, the diagnosis requires additional deficits involving language, executive function, visuospatial skills, judgment, calculation, or abstract reasoning. These cognitive impairments reflect underlying neurodegenerative or vascular processes that gradually disrupt neuronal networks...
Alzheimer Disease l: Introduction01:29

Alzheimer Disease l: Introduction

Alzheimer disease is a chronic, progressive, and irreversible neurodegenerative disorder and the most common cause of dementia in older adults. It leads to gradual neuronal loss, causing cognitive decline, behavioral changes, and loss of functional independence.Risk Factors and EtiologyThe disease is multifactorial. Age is the strongest risk factor, with prevalence doubling every 5 years after age 65. Genetic factors include mutations in genes such as APP, PSEN1, and PSEN2, which are associated...
Alzheimer's Disease: Overview01:26

Alzheimer's Disease: Overview

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.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
Alzheimer Disease ll: Pathophysiology01:23

Alzheimer Disease ll: Pathophysiology

Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...
Prevalence and Incidence01:08

Prevalence and Incidence

In statistical epidemiology and health sciences, two essential metrics—prevalence and incidence—are fundamental for understanding disease dynamics within a population. These measures enable public health officials, epidemiologists, and researchers to assess the burden of diseases, allocate resources effectively, and design impactful public health policies and interventions.
Prevalence indicates the proportion of individuals in a population who have a specific disease or health condition at a...

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Related Experiment Video

Updated: Jul 14, 2026

Symmetric Bihemispheric Postmortem Brain Cutting to Study Healthy and Pathological Brain Conditions in Humans
08:29

Symmetric Bihemispheric Postmortem Brain Cutting to Study Healthy and Pathological Brain Conditions in Humans

Published on: December 18, 2016

[Epidemiology of dementia].

Claudine Berr1, Tasnime Nassime Akbaraly, Fati Nourashemi

  • 1Inserm, U888, Université Montpellier 1, Montpellier (34). berr@montp.inserm.fr

Presse Medicale (Paris, France : 1983)
|June 15, 2007
PubMed
Summary

Dementia poses a significant public health challenge, with incidence rising with age and affecting women more after 80. Lifestyle factors are key, and more research is needed on managing hypertension, diabetes, and dyslipidemia to reduce dementia risk.

Area of Science:

  • Gerontology
  • Public Health
  • Neurology

Background:

  • Dementia is a growing global health concern, projected to increase significantly over the next three decades.
  • Prevalence escalates with age, and women, particularly those over 80, exhibit a slightly higher incidence rate.
  • Average survival post-dementia onset is approximately five years, highlighting the disease's profound impact.

Purpose of the Study:

  • To underscore the critical role of lifestyle and health habits in dementia prevention.
  • To identify key risk factors associated with dementia, including physical, intellectual, and social activities, as well as nutritional patterns.
  • To emphasize the need for robust intervention studies investigating the potential of managing hypertension, diabetes, and dyslipidemia to decrease dementia incidence.

Main Methods:

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Using Retinal Imaging to Study Dementia
09:17

Using Retinal Imaging to Study Dementia

Published on: November 6, 2017

Related Experiment Videos

Last Updated: Jul 14, 2026

Symmetric Bihemispheric Postmortem Brain Cutting to Study Healthy and Pathological Brain Conditions in Humans
08:29

Symmetric Bihemispheric Postmortem Brain Cutting to Study Healthy and Pathological Brain Conditions in Humans

Published on: December 18, 2016

Using Retinal Imaging to Study Dementia
09:17

Using Retinal Imaging to Study Dementia

Published on: November 6, 2017

  • This abstract does not detail specific methodologies but calls for data from well-conducted intervention studies.
  • Focus is placed on evaluating the impact of managing chronic conditions on dementia risk.
  • The need for rigorous research designs is highlighted.

Main Results:

  • The abstract does not present specific results but outlines the expected outcomes of future research.
  • It suggests that improved management of hypertension, diabetes, and dyslipidemia may be linked to a reduced incidence of dementia.
  • Lifestyle factors are presented as crucial modifiable elements.

Conclusions:

  • Dementia represents a substantial and increasing public health burden.
  • Lifestyle modifications and proactive management of cardiovascular risk factors are essential for potentially mitigating dementia.
  • Further intervention studies are imperative to confirm the efficacy of managing hypertension, diabetes, and dyslipidemia in dementia prevention.