Hearing Loss and Cognitive Health in Older Adults
Summary
Hearing loss is among the most prevalent chronic conditions affecting older adults, with sensorineural degeneration of cochlear hair cells and auditory nerve fibres underpinning the majority of cases. Age-related hearing impairment not only compromises communication and social engagement but also emerges as a significant modifiable risk factor for cognitive decline and dementia. Three interrelated mechanisms have been proposed: impoverished auditory input may lead to cortical reorganisation and reduced stimulation of temporal and prefrontal networks; increased listening effort in challenging environments can deplete cognitive resources, thereby accelerating decline; and diminished social participation may exacerbate mood disturbances and weaken cognitive reserve. The global burden of unaddressed hearing loss is magnified in regions with limited access to primary ear care and affordable amplification devices. Conversely, timely identification through audiometric screening, combined with interventions such as hearing aids and auditory rehabilitation, has the potential to preserve both communication function and cognitive health. A holistic approach integrating otological, neuropsychological and social support frameworks is essential to mitigate the dual burden of hearing impairment and cognitive decline in ageing populations.
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Hearing Loss and Cognitive Health in Older Adults publication trend
The graph below shows the total number of articles in hearing loss and cognitive health in older adults across all publications each year (not limited to Nature Index journals).
Technical terms
Sensorineural hearing loss: Impairment arising from damage to cochlear hair cells or the auditory nerve, leading to reduced sensitivity and clarity of auditory signals.
Cognitive reserve: The brain’s resilience to age-related or pathological changes, reflecting efficient neural networks and compensatory cognitive strategies.
Dementia: A syndrome marked by progressive deterioration in memory, thinking, behaviour and the capacity to perform everyday activities, typically associated with neurodegenerative processes.
Speech-in-noise testing: An assessment of the ability to perceive and comprehend speech against background noise, offering a real-world measure of auditory and cognitive integration.
References
- Association between hearing aid use and all-cause and cause-specific dementia: an analysis of the UK Biobank cohort. The Lancet Public Health (2023).
- Hearing loss prevalence and years lived with disability, 1990–2019: findings from the Global Burden of Disease Study 2019. The Lancet (2021).
- How Can Hearing Loss Cause Dementia?. Neuron (2020).
- Mechanisms of sensorineural cell damage, death and survival in the cochlea. Frontiers in Aging Neuroscience (2015).
- The Effects of Age-Related Hearing Loss on the Brain and Cognitive Function. Trends in Neurosciences (2020).
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