A brain-imaging study from an MIT–Boston University collaboration, published Aug. 24, 2026, in Nature Communications, reported that activity in the brain's language processing network was nearly identical in younger and older adults during language tasks. In contrast, activation patterns in the multiple demand network, involved in executive control tasks such as decision-making, differed substantially between the two groups.

The researchers compared people ages 17-39 and 41-80. During a spatial memory task, the older group's multiple demand networks were smaller, less synchronized and more weakly activated. While participants listened to stories and read sentences, language responses showed similar levels and spatial distribution in both groups, including responses to unfamiliar words and unusual grammatical constructions. The language network showed no signs of reduced synchronization or of merging with the multiple demand network.

The study did not evaluate language ability; the authors cite other research indicating language skills generally remain stable or improve with age, possibly as vocabulary grows. They suggest specialized networks such as language may be more resilient to aging than the general-purpose multiple demand network.