This study will use brain wave information, known as electroencephalography (EEG), to help guide anesthesia delivery during surgery. It is believed that the use of EEG has the potential to reduce postoperative delirium - a common side effect of general anesthesia. Postoperative delirium is known to cause long lasting cognitive deficits and increase the chance of developing dementia in geriatric patients. This study aims to reduce these risks posed by modern day anesthesia practices through more efficient delivery of anesthesia utilizing brain wave activity information.