Clinical Dementia Rating
Clinical Dementia Rating - Related Videos
09:17
Using Retinal Imaging to Study Dementia
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Cited by 19 •
2017
The retina shares prominent similarities with the brain and thus represents a unique window to study vasculature and neuronal structure in the brain non-invasively. This protocol describes a method to study dementia using retinal imaging techniques. This method can potentially aid in diagnosis and risk assessment of dementia.
06:23
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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Cited by 68 •
2016
This article describes the 4 Mountains Test (4MT), a hippocampus-dependent test of working allocentric spatial memory. The hippocampus is affected early in Alzheimer's disease (AD) and this article outlines the 4MT methodology and results of patient testing, which demonstrates the value of the 4MT in the diagnosis of pre-dementia AD.
01:30
Dementia
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2025
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.
01:22
Dementia l: Introduction
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2026
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...
02:53
Reaction Rate
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2020
The rate of reaction is the change in the amount of a reactant or product per unit time. Reaction rates are therefore determined by measuring the time dependence of some property that can be related to reactant or product amounts. Rates of reactions that consume or produce gaseous substances, for example, are conveniently determined by measuring changes in volume or pressure. The mathematical representation of the change in the concentration of reactants and products, over time, is the rate...
FAQs
Each domain captures a different aspect of impairment, from memory and orientation to judgment, community affairs, home activities, and personal care. Considering these areas together allows the clinician to represent both cognitive changes and their effects on functioning. The resulting pattern supports a more informative severity assessment than any single domain could provide.
The assessment combines a clinician’s structured interview with the patient and an informant to characterize impairment across cognitive and functional domains. This approach is especially relevant when evaluating activities such as community participation, household interests, or personal care, where everyday functioning forms an important part of the clinical picture.
The global stage summarizes overall severity on a scale from 0 through 3, whereas individual domain scores preserve information about specific areas of impairment. Examining both levels helps clinicians describe the person’s general stage while also identifying whether changes are concentrated in memory, daily activities, judgment, or other assessed domains.
Domain-level results separate cognitive areas, such as memory and orientation, from activities that reflect functioning, including community affairs, home and hobbies, and personal care. This distinction helps clinicians and researchers examine whether observed deterioration primarily concerns cognition, daily independence, or both, providing more context for interpreting progression over time.
A clinician conducts a structured interview with the patient and an informant, then evaluates six specified domains: memory, orientation, judgment and problem solving, community affairs, home and hobbies, and personal care. Ratings across these domains are combined into a global stage, creating a structured record for clinical characterization and follow-up.
The scale supports several uses, including diagnosis, longitudinal monitoring, participant characterization, and assessment of treatment outcomes. In neuroscience studies, researchers can use the global stage to describe overall dementia severity and the domain scores to examine more specific cognitive or functional changes across participants or across repeated assessments.