The reason for the link between hearing loss, cognitive decline and dementia is still unknown.
Those who have investigated the relationship between hearing loss and dementia suggest that a common pathology may cause both conditions or that the strain of decoding sounds over the years may overwhelm the brains of people with hearing loss, leaving them more vulnerable to dementia.
The investigators also suggest that hearing loss requires so much ”brain effort” over the years to decode sounds into useful information, that those with hearing loss become more vulnerable to dementia.
Another theory is that hearing loss could lead to dementia by making individuals more socially isolated, a known risk factor for dementia and other cognitive disorders.
Source:”Hearing well to train your brain” by Prof. Frank R. Lin and Prof. Sophia E. Kramer
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