Smell and Taste, Volume 164 focuses on recent clinical research regarding two of our primary chemical senses, smell and taste. This volume is the most comprehensive neurology book on disorders of smell and taste function. Its major sections include epidemiology, anatomy and physiology, and clinical assessment, including neuroimaging, clinical conditions affecting smell and taste function (e.g., autoimmune disorders, head trauma, diseases of the nose and mouth, etc.). The widespread use of olfactory testing in clinical trials searching for biomarkers of neurodegenerative diseases is reviewed, along with evidence that smell dysfunction can be an early marker in neurodegenerative diseases and autoimmune disorders.