For years lip service has been paid to a belief in a biological basis for schizophrenia, but ,nevertheless psychosocial and psychodynamic "theories" of schizophrenia have been promulgated, and these have detracted from the all important biological work, Eclecticism has ruled the day and has caused considerable confusion, As a result research in schizophrenia has not progressed as fast as it should have done and treatment has been less effective than it could otherwise have been. This book is devoted to a wholly biological approach to the problem of schizophrenia, in the hope that many more workers will enter this exciting field of research. A wide variety of topics is covered, including brain structure; the genetics, pathogenesis and treatment of schizophrenia; a consideration of dietary and immunological factors and finally a chapter on alcoholism as it seems possible that the problems of schizophrenia and addiction are linked. We are grateful to all our contributors and to MTP Press for their enthusiasm for this book. Gwynneth P Hemmings William A Hemmings XI SECTION 1: Structure 1 The brain stem reticular formation K. E. WEBSTER There can be no question that the brain stem reticular lormation no longer exercises the same fascination for neurologists that it did a quarter of a century ago.