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Related Concept Videos

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...
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.
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.
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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: May 28, 2026

The 4 Mountains Test: A Short Test of Spatial Memory with High Sensitivity for the Diagnosis of Pre-dementia Alzheimer's Disease
06:23

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Published on: October 13, 2016

Evaluation of suspected dementia.

B Brent Simmons1, Brett Hartmann, Daniel Dejoseph

  • 1Drexel University College of Medicine, Philadelphia, PA 19127, USA. bsimmons@drexelmed.edu

American Family Physician
|October 21, 2011
PubMed
Summary

Dementia prevalence is rising in the US. A two-visit strategy using brief screening tests can help primary care physicians efficiently detect dementia in older adults.

Area of Science:

  • Geriatrics
  • Neurology
  • Public Health

Background:

  • The US population is aging, leading to an increased prevalence of dementia.
  • Identifying dementia risk factors such as age, genetics, and comorbidities is crucial.
  • Early detection and assessment are vital for managing dementia.

Purpose of the Study:

  • To outline a time-effective, two-visit approach for primary care physicians to screen and assess patients for dementia.
  • To highlight the utility of brief cognitive screening tests in busy outpatient settings.

Main Methods:

  • Utilizing a two-visit strategy for dementia assessment in primary care.
  • Employing brief screening tests (e.g., verbal fluency, Mini-Cognitive Assessment Instrument, Sweet 16) during the first visit.

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  • Conducting further cognitive testing (e.g., Mini-Mental State Examination, Geriatric Depression Scale) and diagnostic studies during the second visit if indicated.

    • Main Results:

    • Brief screening tests demonstrate high sensitivity and specificity for dementia detection.
    • The two-visit approach is efficient for primary care physicians managing a high patient volume.
    • Abnormal screening results or clinical suspicion warrant further laboratory and imaging studies.

    Conclusions:

    • A structured, two-visit approach facilitates timely dementia screening and assessment in primary care.
    • Early identification of dementia through validated screening tools is feasible and effective.
    • Comprehensive assessment, including cognitive testing and diagnostic studies, aids in accurate dementia diagnosis.