The main purpose of this research project is to study how seizure-like activity affects the
blood flow in the brain of patients with Alzheimer's disease (AD). Changes in blood flow can
change memory and thinking ability, as happens in Alzheimer's disease. The investigators are
using a study drug called Levetiracetam, which helps control seizure-like activity to see if
it can help change the abnormal blood flow in the brain that is seen in some people with
Alzheimer's disease.