Delirium By Juebin Huang, MD, PhD, Department of Neurology, University of Mississippi Medical Center Reviewed / Revised Feb 2023 View Patient Education Etiology Pathophysiology Symptoms and Signs Diagnosis Treatment Prognosis Prevention Geriatrics Essentials Key Points Topic Resources Causes of Delirium Overview of Delirium Delirium is an acute, transient, usually reversible, fluctuating disturbance in attention, cognition, and consciousness level.