Language skills stay strong in older adults, even while other cognitive abilities decline
As people age, many cognitive functions tend to decline. Brain-scanning studies have revealed corresponding changes in the function of a brain network involved in many of these cognitive functions, including working memory and problem-solving.
Recent research from MIT and Boston University reveals that language skills in older adults remain robust, despite other cognitive abilities declining. Brain scans indicate that the brain network responsible for language processing remains nearly identical in older and younger adults during language tasks, unlike the "executive system" involved in higher-order thinking.
This suggests language processing areas in the brain may be more resistant to aging compared to the multiple demand network, which shows reduced synchronization and activation in older adults. The study, published in Nature Communications, involved comparing brain activity patterns between individuals aged 17-39 and 41-80 while performing tasks that primarily engaged either the language network or the executive network.
Across both groups, language network activity remained consistent in terms of intensity, spatial distribution, and sensitivity to novel or complex linguistic input. The findings imply that specialized regions for specific functions, like language processing, may maintain better cognitive resilience against age-related changes than more versatile networks that adapt readily to new skills and challenges.
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