Aging Brain and Hearing: A Mini-Review.

Area of Science:

• Aging Medicine
• Neuroscience
• Auditory Science

Background:

• Brain reserve is a key concept in aging medicine, explaining preserved cognitive function despite neuropathology.
• Brain volume serves as a surrogate measure for brain reserve capacity.
• Accumulating evidence links age-related hearing loss to dementia, identifying it as a modifiable risk factor.

Purpose of the Study:

• To review the concept of brain reserve.
• To examine studies on brain morphology and its relation to hearing loss and compensation.
• To present findings on the impact of hearing loss on brain structure.

Main Methods:

• Literature review of brain reserve and hearing loss studies.
• Analysis of morphological studies on the aged brain and auditory function.
• Inclusion of findings from a previous study on hearing loss and brain atrophy.

Main Results:

• Hearing loss in middle age is associated with atrophy in the hippocampus.
• Middle-aged hearing loss is linked to atrophy in the primary auditory cortex.
• Brain reserve capacity may be influenced by auditory function and age-related changes.

Conclusions:

• Brain reserve is crucial for cognitive resilience in aging.
• Hearing loss, particularly after middle age, may negatively impact brain structures.
• Further research is needed to understand the interplay between hearing, brain reserve, and dementia risk.