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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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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: Jan 15, 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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Evaluation of Suspected Dementia.

E Seth Kramer1, Melissa N Johnson1, Bradford Winslow1

  • 1University of Colorado Anschutz School of Medicine, Aurora.

American Family Physician
|January 14, 2026
PubMed
Summary

Dementia evaluation involves recognizing early signs and using screening tools. Further assessment includes history, exams, lab tests, and brain imaging to differentiate from reversible conditions.

Area of Science:

  • Neurology
  • Geriatrics
  • Cognitive Science

Background:

  • Dementia is a significant neurocognitive disorder impacting daily life.
  • Aging is the primary risk factor; others include genetics, cardiovascular health, diabetes, and education.
  • Early detection of subtle signs is crucial, as they are often mistaken for normal aging.

Purpose of the Study:

  • To outline the comprehensive evaluation process for dementia.
  • To differentiate dementia from other cognitive impairments and reversible conditions.
  • To guide clinicians in selecting appropriate diagnostic tools and interventions.

Main Methods:

  • Initial screening using tools like Mini-Cog and Memory Impairment Screen (MIS).
  • Detailed cognitive assessment with tools such as MoCA, SLUMS, or RUDAS if impairment is suspected.

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  • Comprehensive patient history, medication review, physical and neurological examinations.
  • Laboratory testing (e.g., vitamin B12, thyroid function) and brain imaging (MRI or CT) to rule out secondary causes.

    • Main Results:

    • Subtle cognitive deficits may be missed or misattributed to normal aging.
    • A multi-faceted approach combining screening, detailed assessment, and objective testing is necessary for accurate diagnosis.
    • Distinguishing dementia from reversible conditions like depression and delirium is a key challenge.

    Conclusions:

    • Early and accurate diagnosis of dementia is essential for timely management.
    • A systematic evaluation incorporating screening tools, clinical assessment, laboratory tests, and imaging improves diagnostic accuracy.
    • Referral to a neurologist is advised for specific clinical scenarios, including early-onset symptoms or diagnostic uncertainty.