H. Kase, Introductory Remarks: Adenosine A2A Receptor Antagonists: A Novel Approach to the Treatment of Parkinson's Disease. -- S.J. Augood, P.C. Emsom, and D.G. Standaert, Localisation of Adenosine Receptors in Brain and Periphery. -- J. Shimada and F. Suzuki, Medicinal Chemistry of Adenosine Receptors in Brain and Periphery. -- A. Karasawa, Overview of the Physiology and Pharmacology of Adenosine in the Peripheral System. -- H. Nonaka and M. Ichimura, Biochemical Characterizatoin of Adenosine Agonists and Antagonists. -- A. Mori and T. Shindou, Physiology of Adenosine Receptors in the Striatum: Regulation of Striatal Projection Neurons. -- P. Richardson and M. Kurokawa, The Regulation of Neurotransmitter Release in Basal Ganglia by Adenosine Receptor Agonists and Antagonists in Vitro and in Vivo. -- A. Dixon and P. Richardson, Control of Gene Expression in the Basal Ganglia Induced by Adenosine Receptors. -- S. Aoyama, J.-H. Baik, H. Kase, and E. Borrelli, Knockout Mice in the Study of Dopaminergic Diseases. -- S. Shiozaki, S. Ichikawa, J. Nakamura, and Y. Kuwana, Effects of Adenosine Receptors Experimental Models of Cognition and Motor Behaviour. -- T. Kanda and P. Jenner, Actions of Adenosine Antagonists in a Primate Model of Parkinson's Disease. -- A. Tahar, R. Grondin, L. Gregoire, A. Mori, H. Kase, and P.J. Bedard, Selective Adenosine A2A Receptor Antagonism as an Alternative Therapy for Parkinson's Disease: A Study in Nonhuman Primates. -- M. Nomoto, Neurobiology of Adenosine Receptors: Adenosine and its Metabolites in Movement Disorders.