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Related Concept Videos

Alzheimer Disease ll: Pathophysiology01:23

Alzheimer Disease ll: Pathophysiology

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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...
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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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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...
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Dementia l: Introduction01:22

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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...
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Amnesia is a condition marked by long-term memory loss, which impairs the ability to recall past events or create new memories.
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Updated: May 4, 2026

Examining the Characteristics of Episodic Memory using Event-related Potentials in Patients with Alzheimer's Disease
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Context memory in Alzheimer's disease.

Mohamad El Haj1, Roy P C Kessels2

  • 1Laboratoire Epsylon, EA 4556, Université Paul-Valery, Montpellier III, Montpellier, France ; Laboratoire de Psychologie des Pays de la Loire, L'Université Nantes Angers Le Mans (L'UNAM), Angers, France ; Neuropsychology and Auditory Cognition, Department of Psychology, University of Lille 3, Lille, France.

Dementia and Geriatric Cognitive Disorders Extra
|January 10, 2014
PubMed
Summary
This summary is machine-generated.

Alzheimer's disease (AD) impairs context recall, a key part of episodic memory. Understanding these memory deficits is crucial for developing better treatments for AD patients.

Keywords:
Alzheimer's diseaseBindingContext memoryDiagnosisEpisodic memory

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Area of Science:

  • Neuroscience
  • Cognitive Psychology
  • Neurology

Background:

  • Alzheimer's disease (AD) is a progressive neurodegenerative disorder.
  • AD is characterized by significant memory loss, particularly affecting episodic memory.
  • Contextual memory, essential for episodic memory, is notably impaired in AD patients.

Purpose of the Study:

  • To elucidate the neurocognitive mechanisms underlying context memory deficits in Alzheimer's disease.
  • To explore how Alzheimer's disease impacts the ability to recall contextual information.
  • To identify key questions for future research into memory impairments in AD.

Main Methods:

  • This study is a review of existing literature on Alzheimer's disease and memory.
  • It focuses on the neurocognitive aspects of context memory in AD.
  • The review synthesizes findings related to episodic memory function and its decline in AD.

Main Results:

  • Context recall, defined as remembering the circumstances of an event, is a critical component of episodic memory.
  • AD patients exhibit specific difficulties in binding contextual features of memories.
  • The review highlights that context recall is significantly compromised in Alzheimer's disease.

Conclusions:

  • Further research is needed to determine which context elements are most affected in AD.
  • Investigating how AD patients fail to integrate context features is crucial.
  • Exploring strategies like distinctiveness heuristic and metacognitive expectations may offer new avenues for improving context retrieval in AD.
  • Understanding the impact of retrieval cues on context reinstatement in AD is essential for advancing knowledge of memory deficits.