Related Experiment Video
Updated: Jun 27, 2026
09:09
Cryosectioning and Immunostaining Mouse Inner Ear Tissue: From Embryonic to Adult Stages
Published on: April 11, 2025
Hearing Loss and Dementia: Risk Factor, Early Marker, or Both?
Ljiljana Cvorovic1,2, Ana Jotic1,2, Bojana Bukurov1,2
1Faculty of Medicine, University of Belgrade, 11000 Beograd, Serbia.
Healthcare (Basel, Switzerland)
|June 26, 2026
Summary
Age-related hearing loss is linked to cognitive decline and dementia risk in older adults. Early hearing intervention may help maintain brain health and quality of life.
Area of Science:
- Gerontology
- Neuroscience
- Public Health
Background:
- Hearing loss and dementia are prevalent in older adults, posing a public health challenge.
- Epidemiological studies show a consistent link between age-related hearing loss and cognitive dysfunction, including dementia.
- The precise nature of the hearing loss-dementia relationship requires further elucidation.
Purpose of the Study:
- To provide a structured overview of current evidence on the relationship between hearing loss and cognitive decline.
- To explore mechanistic pathways, clinical implications, and intervention effectiveness.
- To highlight hearing loss as a potential modifiable risk factor and early marker for cognitive impairment.
Main Methods:
- Narrative review of epidemiological findings, mechanistic pathways, and clinical implications.
- Analysis of evidence linking hearing loss severity to cognitive decline and dementia risk.
- Evaluation of intervention studies, including hearing rehabilitation and neuroplasticity.
Main Results:
- Hearing loss is associated with accelerated cognitive decline and increased dementia risk, with a dose-response relationship.
- Proposed mechanisms include increased cognitive load, brain structural/functional changes, social isolation, and shared risk factors.
- Hearing rehabilitation improves quality of life, but consistent cognitive decline reduction is not yet proven in the general population; potential benefits may exist in high-risk groups.
Conclusions:
- Hearing loss may be a modifiable risk factor and an early indicator of cognitive decline.
- Early identification and management of hearing impairment are crucial for cognitive and brain health in older adults.
- Timely intervention is important, as delayed treatment may reduce rehabilitation effectiveness due to auditory deprivation.
Related Concept Videos
01:29Alzheimer 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...
01:22Dementia 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...
01:30Dementia
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.
The progression of dementia is generally gradual.
01:23Alzheimer Disease ll: Pathophysiology
Alzheimer disease involves structural changes in the brain that begin long before symptoms appear. The most distinctive features are extracellular neuritic plaques and intracellular neurofibrillary tangles.Neuritic plaques form in the cerebral cortex and around blood vessels. These plaques contain a dense core of beta-amyloid (Aβ)—a toxic protein fragment that clumps outside neurons. The core is surrounded by damaged neuronal extensions, as well as reactive astrocytes and microglia. Abnormal...
01:26Alzheimer'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.
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
The clinical diagnosis of AD hinges on the presence of memory and other cognitive impairments. Biomarkers, such as changes in Aβ and tau...
01:19Psychoneuroimmunology: Diabetes and Cancer
Chronic stress has been linked to both the onset and progression of serious health conditions, including Type 2 diabetes and cancer. Type 2 diabetes, a widespread chronic illness, is closely associated with obesity and insulin resistance, both of which often worsen under stress. Studies indicate that men experiencing high levels of chronic stress face a 45% higher risk of developing diabetes compared to those with minimal stress. Stress triggers physiological responses that elevate blood...