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Related Concept Videos

Dementia01:30

Dementia

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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.
The progression of dementia is generally gradual....
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Alzheimer's Disease: Overview01:26

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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.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ...
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Amnesia01:13

Amnesia

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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.
The severity and duration of memory loss vary depending on the type and underlying cause. Amnesia is classified into two main types: retrograde and anterograde.
Retrograde amnesia is marked by the loss of memories formed before the onset of the condition. Patients may recall distant past events but often forget those occurring shortly before the incident.
Anterograde...
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Alzheimer's Disease: Treatment01:22

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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...
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Related Experiment Video

Updated: Feb 22, 2026

The 4 Mountains Test: A Short Test of Spatial Memory with High Sensitivity for the Diagnosis of Pre-dementia Alzheimer's Disease
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The 4 Mountains Test: A Short Test of Spatial Memory with High Sensitivity for the Diagnosis of Pre-dementia Alzheimer's Disease

Published on: October 13, 2016

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[Diagnostics in memory loss: for whom, what and when?]

E Richard1, E P Moll van Charante

  • 1Radboudumc, afd. Neurologie, Donders institute for Brain, Behaviour and Cognition, Nijmegen.

Nederlands Tijdschrift Voor Geneeskunde
|September 23, 2017
PubMed
Summary

Early diagnosis of memory problems is challenging. Current evidence doesn't support the routine use of advanced tests like MRI, CSF, or PET scans for mild cognitive impairment, as potential harms outweigh benefits.

Area of Science:

  • Neurology
  • Diagnostic Medicine
  • Geriatrics

Background:

  • Growing demand for early diagnosis of memory impairments.
  • Diagnostic tests for mild cognitive impairment (MCI) function as prognostic tests.
  • Challenges in interpreting prognostic test results exist.

Purpose of the Study:

  • To evaluate the incremental diagnostic and prognostic value of specific tests for MCI.
  • To assess the utility of MRI, cerebrospinal fluid (CSF), and positron emission tomography (PET) scanning in memory clinics.
  • To inform clinical practice guidelines regarding diagnostic test use in cognitive impairment.

Main Methods:

  • Review of evidence on diagnostic and prognostic tests for MCI.
  • Analysis of the incremental value of MRI, CSF, and PET scans.

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Last Updated: Feb 22, 2026

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  • Consideration of potential harms of early labeling (e.g., prodromal Alzheimer's disease).

    • Main Results:

    • Insufficient evidence exists regarding the incremental diagnostic value of MRI, CSF, and PET scans in memory clinic populations.
    • The prognostic nature of these tests complicates their interpretation.
    • Potential harm from mislabeling individuals with MCI as having prodromal Alzheimer's disease is a concern.

    Conclusions:

    • The current Dutch practice guideline's cautious approach to diagnostic tests for cognitive impairment is appropriate.
    • Scientific evidence does not currently support widespread, early use of advanced diagnostic tests for MCI.
    • A reticent attitude towards diagnostic testing in cognitive impairment is scientifically sound and clinically appropriate.