Researchers report that the brain undergoes two notable transitions, described as “gear changes,” during a person’s lifetime—one in early adulthood around age 24 and another later around age 60. The claim is based on a large study examining changes in brain function over time.
The outlets covering the story present the finding as a clear pattern of change occurring at these two life stages. However, the provided excerpts do not specify key methodological details, such as the type of brain measures used, the sample size, participant characteristics, or how the “gear shifts” are defined and detected. As a result, readers are not given the full context needed to assess how the study reaches its timing estimates, or how consistent the findings are across populations.
Both sources rely on the same core message: the brain shows two major transitions at roughly the mid-twenties and around retirement age. Neither excerpt includes information about potential causes, implications for health or cognition, or whether the results translate into practical guidance for individuals.
