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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...
Association Areas of the Cortex01:21

Association Areas of the Cortex

Association areas are regions of the cerebral cortex that do not have a specific sensory or motor function. Instead, they integrate and interpret information from various sources to enable higher cognitive processes such as memory, learning, and decision-making. Some key association areas include the following:
Prefrontal Association Area: This area is located in the frontal lobe and is involved in planning, decision-making, and moderating social behavior. It connects with primary motor areas,...
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...

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Related Experiment Video

Updated: Jul 14, 2026

Abbiategrasso Brain Bank Protocol for Collecting, Processing and Characterizing Aging Brains
12:28

Abbiategrasso Brain Bank Protocol for Collecting, Processing and Characterizing Aging Brains

Published on: June 3, 2020

[Frontotemporal dementia].

Isabelle Le Ber1, Bruno Dubois

  • 1Inserm U679, Neurology and Experimental Therapeutics, Paris (75). leber@ccr.jussieu.fr

Presse Medicale (Paris, France : 1983)
|June 9, 2007
PubMed
Summary

Frontotemporal dementia (FTD) typically emerges before 65, presenting with behavioral and language issues due to frontal and temporal lobe damage. Anticholinesterase treatments are ineffective for FTD.

Area of Science:

  • Neurology
  • Neuroscience
  • Genetics

Background:

  • Frontotemporal dementia (FTD) is a neurodegenerative disorder.
  • It commonly manifests before age 65 with behavioral and language impairments.
  • Bilateral frontal and temporal lobe lesions characterize FTD.

Purpose of the Study:

  • To summarize key characteristics of frontotemporal dementia.
  • To highlight the prevalence of psychiatric diagnoses at onset.
  • To emphasize the significant genetic component and implications for treatment.

Main Methods:

  • Review of clinical presentation and pathological findings in FTD.
  • Analysis of patient history regarding psychiatric diagnoses and family history.
  • Evaluation of the role of cholinergic systems in FTD.

Related Experiment Videos

Last Updated: Jul 14, 2026

Abbiategrasso Brain Bank Protocol for Collecting, Processing and Characterizing Aging Brains
12:28

Abbiategrasso Brain Bank Protocol for Collecting, Processing and Characterizing Aging Brains

Published on: June 3, 2020

Main Results:

  • FTD onset is typically before 65 years of age.
  • Behavioral and language disorders are primary manifestations.
  • Psychiatric diagnoses occur in one-third of patients at disease onset.
  • A significant genetic component is present, with 30-50% of patients having a family history.
  • Cholinergic pathways are not implicated in FTD.

Conclusions:

  • FTD is characterized by early onset, specific behavioral/language symptoms, and bilateral brain lesions.
  • Genetic predisposition and psychiatric comorbidities are notable aspects of FTD.
  • The lack of cholinergic involvement contraindicates anticholinesterase therapies for FTD.