Age-related hearing loss linked to cognitive decline associated with Alzheimer's disease, suggests study
A new study published in the journal of Audiology Research found the intricate connections between hearing loss, central auditory processing disorders, and cognitive decline, specially in the context of Alzheimer's disease. The World Health Organization defines hearing loss as the incapacity to perceive noises louder than 25 decibels. The stria vascularis, the auditory nerve, and the mechano-transducing cochlear inner and outer hair cells are among the auditory components that degenerate in age-related hearing loss (ARHL).
An increasing amount of evidence points to a connection between ARHL and structural alterations in the brain, particularly reduced volumes in areas linked to auditory processing. As a compensating mechanism, ARHL also causes nonauditory brain areas to become more active and people may be more susceptible to dementia as a result of these alterations. Determining the causal direction of this connection is the primary goal of hearing-dementia research.
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