It is a great honor and pleasure for cerebral infarction have been carried me to have Springer-Verlag publish out. Dr. Yoshimoto hoped that the this volume entitled "Treatment of results of research done in our depart Cerebral Infarction." I am much in ment over the last sixteen years con debted to my colleagues for my success cerning cerebral infarction could be in publishing this book. published. Moved by his enthusiasm, I have engaged in clinical work in my colleagues took their share in writ the field of neurosurgery for these few ing each article. I suggested to them decades and I have performed more that this volume should cover primarily than 5,000 major operations of intra the results of our own research, but that cranial surgery. Throughout this time, at the same time it should also include it has been my privilege to conduct a 2- the results of related work done by neurosurgical experts throughout the hour-morning research seminar in our department every Wednesday and to world. Therefore, I hope that this book supervise a great deal of research. At will interest many investigators who these seminars my fellow research have devoted themselves to research in workers and I have exchanged many the field of neuroscience. ideas about the study of neurosurgery My colleagues acknowledge that and we have designed many animal our research has been stimulated and experiments."