The Nato Advanced Study Institute on Humoral Immunity in Neurological Diseases became possible thanks to the active help of many people. I will not mention our colleagues at the neuroche mical laboratory of the Born-Bunge Foundation : it was our common job. But I wish to thank : - the Nato and Dr. Kester for their aid, support and gene rosity, - the Belgian Ministry of Foreign Affairs and Secretary-ge neral Mr. Grandry for their help and assistance in esta blishing valuable contacts with many foreign countries, - the Belgian Ministry of Culture for their grant, - the National Fund for Scientific Research and the Belgian Society of Neurology for their financial support. Substantial help came from the Universitaire Instelling Ant werpen : not only financiall~ but by allowing members of their staff to assist us 'in many ways. The Belgian Friends of the Weizmann Institute and the Belgian Medical Care for Israel helped invite some participants, and many firms made a contribution to our organization. To all of them our warmest thanks.

Inhalt
I Spontmeous and Experimental Diseases.- A. Multiple Sclerosis.- B. Subacute Sclerosing Panencephalitis.- C. Genetic Implications.- D. Animal Diseases.- II Restricted Heterogeneity (Oligoclonal Reaction).- A. Cerebrospinal Fluid Methodology.- B. IgG Restricted Heterogeneity.- C. Immunochemistry.- D. Viral Antigens.- E. Central Nervous System Antigens.- F. Nervous System Response.- Topic III Therapeutic Considerations.- VariaOther Diseases.- Participants.