Researchers from the University of California published findings in the Journal of Alzheimer’s Disease showing that hearing loss can trigger changes in brain regions tied to processing sounds and maintaining attention. These shifts may increase the risk of dementia over time.
In a study involving 130 participants, including individuals with hearing impairment, researchers tracked health metrics and used magnetic resonance imaging to observe brain structure. The results revealed microstructural changes in auditory regions of the temporal and frontal lobes involved in speech processing, along with areas governing attention.
These brain changes could raise dementia risk, the researchers note. The likely mechanism involves greater cognitive effort required to hear environmental sounds and understand speech, which can overburden mental resources. The exact biological pathways behind this link are not yet fully understood.
The researchers suggest that interventions such as wearing hearing aids, watching television with subtitles, and engaging in conversations in quiet settings may reduce dementia risk for those with hearing loss.
Earlier work by other scientists has explored varied factors affecting Alzheimer’s risk. For instance, some studies have noted intriguing connections between environmental factors and cognitive health, underscoring the importance of a broad approach to prevention and early intervention. At the same time, ongoing research continues to refine how sensory health and brain aging interact. (Attribution: University of California study, Journal of Alzheimer’s Disease; related commentary from independent researchers is summarized in field reports.)