Age-Related Hearing Decline and Resting-State Networks.
Cassidy Teuscher Ellsworth, Lucas A Kortus, Joanne Vuong and 4 others
PMID 40924510WHAT IT FOUND
Older adults and those with high-frequency hearing loss showed weaker connectivity in brain networks handling salience and speech.
This may explain why listening in noise feels more effortful, even when the person does not report hearing problems.
Key findings
01Older adults showed weaker resting-state functional connectivity in the salience network, particularly involving the anterior cingulate cortex.
02Participants with positive hearing screening results showed weaker connectivity between attention and auditory regions compared to those with normal hearing.
03High-frequency hearing loss was associated with reduced local efficiency in the left supramarginal gyrus, a region important for speech comprehension.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study is cross-sectional, so it cannot prove that hearing loss causes these brain changes or that they precede cognitive decline. The sample size is relatively small (49 participants), and the groups were defined by screening cutoffs rather than clinical diagnosis. Cognitive performance was measured with brief screening tools (KBIT-2) rather than a comprehensive neuropsychological battery, so subtle cognitive differences might have been missed. The participants were self-reporting normal hearing, meaning some may have had undetected hearing difficulties that influenced their behavior or brain function prior to the study.
Declared interests
Funded by the National Institute on Deafness and Other Communication Disorders and various university trusts. The funders had no role in study design, data collection, analysis, or manuscript preparation.
The easy way to misread this
Do not assume these brain connectivity changes directly translate to measurable cognitive impairment or dementia risk in these specific patients, as the study found no differences in their current executive function or intelligence scores.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →