Since the publication of Neurobiology of Cerebrospinal Fluid 1 in 1980, that text has become the definitive reference concerning cerebrospinal fluid (CSF) for both basic scientists and clinicians involved in the investigation of degenerative, convulsive, cerebrovascular, traumatic, immunological, demyelinating, inflammatory, neoplastic, neuroendocrine, and psychiatric disorders. That initial volume began a tradition of detailed topic reviews written by international authorities with first-hand expertise in their respective fields of CSF research. Neurobiology of Cerebrospinal Fluid 2 represents a hefty collection of extensively refer­ enced and illustrated chapters covering topics not discussed in Vol. 1. More specifically, these chapters contain ample charts of original data, summary charts, and anatomical diagrams. Detailed illustrations of experimental and clinical techniques have been in­ cluded to facilitate their practical application. Each chapter in this multidisciplinary text has been critically reviewed by two experts in the respective field, and the appropriate revisions have been made. Recently published references and text modifications have been added at the proof stage in an effort to provide the most up-to-date review chapters possible.