Scientists in the US and Europe are exploring whether an experimental surgery can treat Alzheimer’s disease. | Fiordaliso/Getty Images The videos are astonishing. In one scene, a senior Chinese woman appears lost in the wilderness of dementia, unable to answer basic questions; in the next, she seems to be lucidly chatting and shucking beans for dinner. By all appearances, years of cognitive decline had been rapidly reversed after the patient underwent an experimental new surgery. The only problem is: No one is sure if it’s real. It’s difficult to take any video at face value in the age of AI, and this experimental procedure happened in China, a country with a recent history of controversial science touting extraordinary but questionable claims. In the past few years, researchers there have published several papers reporting promising results from a procedure that purports to attack Alzheimer’s disease in a peculiar way: by connecting vessels from the lymph nodes in the neck to nearby veins in an attempt to drain the brain of harmful waste. But these have been small studies that did not include a control group. The doctor who first pioneered the surgery there has reportedly been placed under arrest, and the Chinese government has...
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