Remove the Plaques.
One cause of Alzheimers is misfolded proteins -- for example Amyloid and Tau proteins -- gumming up the brain and preventing it from sending electrical signals properly. These deposits are called plaques.
The good news is you can just remove the plaques and the brain will go back to normal function. For that just tell your futuristic Holo-Doctor to engineer a selective amyloid inhibitor.