INTUIT is an ongoing 5-year observational prospectivecohort study and has thus far enrolled 91 patients. Participants undergo pre- and postoperative cognitive testing anddelirium screening, QOL assessments, fMRI scans, intraoperative EEG recordings, and CSF and blood analyses. Eachsubject is followed for 1 year. Table 1 shows the timeline ofactivities for study subjects.