Dementia Risk Factors
Dementia Risk Factors - 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.
01:26
Factors Affecting the Risk of Infection
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2023
The hosts' susceptibility to infection depends on several factors. The integrity of the skin and mucous membranes helps protect the body against microbial attacks. When the skin is altered, the chance of infection, limb loss, and even death increases. The integrity and count of the white blood cells help the body resist pathogens and fight infection. When impaired, it reduces the body's resistance to pathogens. The acidic pH levels of the gastrointestinal, genitourinary tracts, and skin create...
01:24
Drug Toxicity: Risk factors
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2026
Adverse Drug Reactions (ADRs) are potential complications that arise during pharmacotherapy, influenced by multiple risk factors. Age plays a significant role; both neonates and the elderly are at heightened risk due to their respective immature and diminished metabolic and elimination processes. Gender also impacts ADRs, with females experiencing a 1.5 to 1.7-fold greater risk than males, which may be linked to pharmacokinetic, pharmacodynamic, and hormonal differences. Notably, neonates, the...
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.
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.
FAQs
Modifiable factors, such as hypertension, diabetes, physical inactivity, smoking, and hearing loss, can potentially be addressed through prevention or intervention. Nonmodifiable factors include age and genetic variation, which cannot be changed but may help explain differences in susceptibility. Separating these categories allows biological research to connect observed risk with opportunities to protect brain health.
Several pathways may connect risk factors with progressive cognitive decline, including vascular injury, neuroinflammation, abnormal protein accumulation, metabolic dysfunction, and neuronal loss. These mechanisms provide a framework for studying how medical and lifestyle characteristics affect brain biology. Examining the pathways helps researchers move beyond simple associations and investigate how dementia develops.
A risk factor indicates an increased likelihood, not a certain outcome. Dementia risk factors are studied because they are associated with cognitive decline, while individual outcomes may differ across people. This distinction is important in biology and neuroscience because it prevents researchers from treating an association as a diagnosis or assuming that one characteristic alone determines disease development.
Researchers can organize risk factors by whether they are modifiable or nonmodifiable and by the biological processes they may influence. For example, age and genetic variation provide nonmodifiable context, whereas hypertension, diabetes, smoking, physical inactivity, and hearing loss identify potentially changeable influences. This organization supports risk assessment while preserving the distinction between association and certainty.
Identifying associated characteristics helps researchers recognize influences that may be addressed before substantial cognitive decline develops. Attention to hypertension, diabetes, physical inactivity, smoking, and hearing loss can inform prevention strategies, while nonmodifiable factors may help identify populations needing closer study. The overall goal is to support earlier intervention without implying that risk assessment predicts an individual outcome with certainty.
They help researchers examine dementia across biological levels, from medical and lifestyle characteristics to vascular injury, neuroinflammation, abnormal protein accumulation, metabolic dysfunction, and neuronal loss. Studying these relationships across different populations can clarify how dementia develops and can guide research into brain health, prevention strategies, and earlier intervention.