Related Experiment Video
Updated: Jul 28, 2026
11:01
Examining the Characteristics of Episodic Memory using Event-related Potentials in Patients with Alzheimer's Disease
Published on: August 30, 2011
[Conceptual decline in Alzheimer's disease]
F Cuetos1, A Dobarro, C Martínez
1Facultad de Psicología, Universidad de Oviedo, Oviedo. fcuetos@uniovi.es
Neurologia (Barcelona, Spain)
|February 24, 2005
Summary
Alzheimer's disease patients show semantic information loss. Stimulus characteristics like frequency and age of acquisition, not category type, are key factors in concept deterioration.
Area of Science:
- Neuroscience
- Cognitive Psychology
- Linguistics
Context:
- Alzheimer's disease (AD) is characterized by progressive semantic memory decline.
- Understanding the pattern of concept loss in AD is crucial for both theoretical insights and practical interventions.
- Previous theories suggested category-specific deficits might be primary in early AD.
Purpose:
- To investigate whether semantic category membership or stimulus-specific features influence concept loss in Alzheimer's disease.
- To compare semantic naming performance between individuals with mild to moderate AD and healthy controls.
Summary:
- A study compared 22 Alzheimer's disease patients with 22 healthy controls on naming objects from eight semantic categories.
- Statistical analyses (ANOVAs) examined group differences and the influence of semantic categories.
- Results revealed that stimulus familiarity, frequency, and age of acquisition were more significant predictors of naming errors than category membership.
Impact:
- Findings challenge category-specific theories of semantic memory loss in AD.
- Highlights the importance of stimulus properties (e.g., word frequency, age of acquisition) in understanding concept degradation.
- Informs the development of more targeted diagnostic and therapeutic strategies for Alzheimer's disease.
More Related Videos
Related Concept Videos
01:26Alzheimer'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...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
01:22Alzheimer's Disease: Treatment
Alzheimer's Disease (AD), a neurodegenerative disorder, is pathologically identified by amyloid plaques and neurofibrillary tangles composed of tau protein. AD pharmacotherapy aims to manage cognitive symptoms, delay disease progression, and treat behavioral symptoms. The treatment is primarily symptomatic and palliative, with no definitive disease-modifying therapy available. Cholinesterase inhibitors, including donepezil (Aricept), rivastigmine (Exelon), and galantamine (Razadyne), are...
01:30Cognitive Development During Adulthood
Cognitive development continues throughout adulthood, undergoing significant shifts across early, middle, and late stages. Individual transition occurs from adolescent idealism to pragmatic and adaptable thinking in early adulthood. During this period, individuals learn to integrate personal beliefs with the recognition that other perspectives are equally valid. Exposure to the complexities of modern society, diverse experiences, and higher education contribute to this adaptive thought process,...
01:29Alzheimer 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...
01:23Alzheimer 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...
01:22Dementia 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...