A large MRI study reported in ScienceDaily found that Alzheimer's disease, mild cognitive impairment, psychiatric disorders, and addiction are each associated with distinct patterns of accelerated brain aging. The analysis drew on a massive set of brain scans, making it one of the larger efforts to link neurological and psychiatric conditions to aging trajectories.
The strongest effects emerged in Alzheimer's disease and mild cognitive impairment, suggesting that these conditions may involve particularly pronounced structural changes over time. The study also examined ADHD and other conditions, though the summary does not detail those specific findings.
According to the report, the distinct patterns across disorders indicate that accelerated brain aging is not a single phenomenon but may manifest differently depending on the underlying condition. This could eventually help researchers refine diagnostic criteria or track disease progression, though the authors note the findings are associative rather than causal.