Alzheimer's disease (AD) is the fifth leading cause of death in adults over 65 years old. While many potential treatments for the neurodegenerative disease focus on developing drugs to target key culprits, a relatively new approach aims to more directly treat the brain. Deep brain stimulation (DBS) is a neurosurgical technique of electrically exciting brain circuits to alleviate symptoms of disorders such as Parkinson's disease and obsessive-compulsive disorder.