The neurodiagnostic technologist (NDT) operates sophisticated equipment that displays the electrical activity of the brain and nervous system. The ND technologist works alongside physicians who interpret the data and provide clinical impressions. ND is a diverse field that includes electroencephalography, nerve conduction studies, intraoperative monitoring, long-term epilepsy monitoring, polysomnography (sleep disorder studies), and evoked potential. Generally working in a hospital or clinical setting, ND technologists prepare patients for procedures, record electrical potentials, obtain medical histories, and calibrate and maintain equipment.