The diseases that fall under the generalized group of demyelinating diseases -Multiple Sclerosis, Leukodystrophyes, Encephalomyelitis-are the focus of worldwide concern. This volume contains papers presented by leading scientists who attended the NATO Advanced Research Workshop held at the Istituto Superiore di SanitA, Rome, March 1-4, 1993. This book is an update of the previous one published in 1987 of the research discussed at a similar meeting held in 1986. It was decided to hold this 2nd meeting since there has been great progress in the advances in understanding the myelinogenesis...