In aged mice, the brain's cleanup crew breaks in the wiring

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1. 1In aged mice, the brain's cleanup crew breaks in the wiring0:00
2. 2Rare in young brains. Dense in aged wiring. Densest in one tract.0:14
3. 3The aging signal is in the cables, not the processors.0:35
4. 4A cleanup cell, broken by its own cleanup.1:03
5. 5Why this tract, and not the one beside it.1:34
6. 6“A more youthful organization” = number, size, and direction.2:01
7. 7Nobody knows if the drug ever reached the brain.2:39
8. 8Brain aging here isn't neurons dying — it's the cleanup crew breaking under its own workload, in one exact spot. And that state is partly reversible.3:01