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Related Concept Videos

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.
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...

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Related Experiment Video

Updated: May 27, 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

Predicting road test performance in drivers with dementia.

David B Carr1, Peggy P Barco, Michael J Wallendorf

  • 1Department of Medicine and Neurology, Washington University, St. Louis, MO, USA. dcarr@dom.wustl.edu

Journal of the American Geriatrics Society
|November 19, 2011
PubMed
Summary
This summary is machine-generated.

A quick cognitive screening accurately predicts driving safety in older adults with dementia. This battery, including the Clock Drawing Test, can identify drivers needing further on-road evaluation.

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Related Experiment Videos

Last Updated: May 27, 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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Published on: September 18, 2012

Area of Science:

  • Gerontology
  • Neurology
  • Occupational Therapy

Background:

  • Driving cessation is a significant concern for older adults with dementia.
  • Assessing on-road driving performance is crucial for safety and independence.

Purpose of the Study:

  • To develop and validate a brief cognitive and functional screening battery for older drivers with dementia.
  • To identify key predictors of on-road driving test failure.

Main Methods:

  • Prospective observational study involving 99 older drivers with dementia.
  • Utilized a modified Washington University Road Test for on-road evaluation.
  • Assessed visual, motor, and cognitive functions, including the Clock Drawing Test and Snellgrove Maze Test.

Main Results:

  • 65% of participants failed the on-road driving test.
  • A predictive model including the Eight-item Informant Interview, Clock Drawing Test, and Snellgrove Maze Test/Trail Making Test A achieved 85% accuracy.
  • Visual and motor functions did not predict road test failure.

Conclusions:

  • A rapid screening battery can accurately predict on-road driving test failure in older adults with dementia.
  • A logistic regression model provides a probability of failure calculator for clinical decision-making.
  • Further research in diverse community samples is recommended, alongside discussions on test uncertainty.