This article summarizes a paper on how the brain ages. "Prevailing theories of cognitive aging depict late life as a period of compensatory decline," write the authors. "We propose instead that aging represents a continuation of development: a genetically conserved, adaptive reorganization of memory systems that parallels the brain's earlier-life transitions." The paper is paywalled but has been covered by other publications, including APS (here), See also the Continuity Theory of Aging. Of course as I reach the age papers like this are talking about the subject is of more interest to me, though there isn't a lot I can do about whatever the actual progression turns out to be, other of course than to continue using and challenging my brain as much as possible.
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