This meeting was held commemorating Dr. Kito's 10th Anniversary as Professor of the Third Department of Internal Medicine, Hiroshima University School of Medicine. Dr. Kito was born in 1927 in Nagoya, graduated from Tokyo University School of Medicine and received his M. D. in 1951. He spent his first academic years as a research associate (1952 - 1968) at the Third Department of Internal Medi cine, Tokyo University School of Medicine. During this period he studied for one year (1952 - 1953) at Illinois University School of Medicine, and acquired his Ph. D. in 1959. In 1968 he became Instructor and in 1971 he was appointed as Assistant Professor of Tokyo Women's Medical College. In 1973, he became Professor of the Third Department of Internal Medicine, Hiroshima University School of Medicine. Dr. Kito is a clinician but he is always enthusiastic about basic medicine. His major research field concerns neurotrans mitters and their receptors in the central nervous system. He prefers a combination of neurotransmitter immunohistochemistry and receptor autoradiography as research techniques. He is also engaged in biochemical studies on amyloid proteins. When the Eighth Inter national Congress of Pharmacology was held in Tokyo in 1981, Dr. Segawa, Dr. Yamamura, and Dr. Kuriyama organized a Satellite Symposium on Neurotransmitter Receptors in Hiroshima. Dr. Kito attended this meeting and was deeply impressed by the active presentations and discussions. In order to make some contribution to the progress of neuro sciences, Dr."

The Third International Symposium on Neurotransmitter Receptors was held in Hiroshima at a time when the entire field of neurotransmitter receptors in the brain is progressing at an unprecedented pace. The sym posium also marked my retirement as Professor and Chairman of the Third Department of Internal Medicine, Hiroshima University School of Medicine, and a new beginning as a Professor of the University of the Air. The symposium was remarkably successful, and there were enthusiastic responses from scientists allover the world, proving that the meeting was timely. The selected papers contained in this volume constitute a state of-the-art survey of the most advanced aspects of neurotransmitter recep tor mechanisms in the brain. lowe thanks for the great success of the symposium to Prof. Richard Olsen of UCLA, Prof. Tomio Segawa of Hiroshima University, Prof. Kinya Kuriyama of Kyoto Prefectural University of Medicine, and Prof. Masaya Tohyama of Osaka University. I express my sincere gratitude to many friends for making this publication possible. I especially thank Dr. Rie Miyoshi, whose devoted efforts as secretary-general were vital to the success of the symposium. Dr. Miyoshi is currently an instructor in the Department of Pharmacology at Tokyo Women's Medical College. I would also like to acknowledge the excellent secretarial work of Misses Ritsuko Sato and Yuko Wakita.