Promising new Alzheimer’s treatment unexpectedly found in old antibiotic

  The results were promising, with the animals showing remarkable synapse repair

Anybody know how this is objectively measured?

Numerous compounds have been found that can break up plaques, but there have been such cases where there's been no demonstrable improvement in movement or behavior. It's as if the plaques themselves aren't the problem but are the immune system's response to the problem, like a scab on a wound -- ripping off the scab isn't helpful.