EEG Characteristics and Postoperative Delirium

The goal of this \[type of study: observational study \] is to \[compare Energy differences in various bands of intraoperative electroencephalogram in elderly patients with postoperative delirium and non delirium.\] in \[describe participant population selected 69 patients who underwent laparoscopic radical surgery for colorectal cancer on a selective basis\]. The main question\[s\] it aims to answer are: • \[Is there any difference in the spectral range of EEG between POD patients and non POD patients\] Participants will \[Cognitive.•Postoperative delirium.•Preoperative weakness.\]