Invited Speakers.- Historical Aspects and Frontiers of Parkinson\'s Disease Research.- Discussion Flemenbaum, Frigyesi, delaTorre, Fahn, Flores Volkman, Mars, Klawans, Duvoisin, Calne.- Recent Advances in the Biochemical Pharmacology of Extrapyramidal Movement Disorders.- Discussion Frigyesi, Klawans, Flemenbaum, Duvoisin, FahnMars, Calne, Pirch, Volkman, Flores, Hornykiewicz.- Treatment of Parkinsonism.- Discussion Frigyesi, delaTorre, Fahn, Duvoisin, Mars Hunt, Volkman, Potter, Franz.- Parkinsonism and Epilepsy.- Discussion Barnes, Messiha, Pirch, Lake, Duvoisin, Fahn.- Neurophysiology of Movement Disorders.- Problems in the Treatment of Parkinsonism.- Discussion Fahn, Mars, Calne, Messiha, Pirch, Clark.- New Approaches in the Management of Hyperkinetic Movement Disorders.- Discussion de la Torre, Mars, Duvoisin, Calne, Potter, Messiha.- Submitted Short Communications.- The On-Off Effect in Parkinson\'s Disease Treated with Levodopa with Remarks Concerning the Effects of Sleep.- Adenylate Cyclase from Various Dopaminergic Areas of the Brain and the Action of Loxapine.- Pharmacopsychiatry and Iatrogenic Parkinsonism.- Comparison of Lithium and Haloperidol Therapy in Gilles de la Tourette Syndrome.- Dopamine Receptors Hypersensitivity: Further Confirmation Following Drug Abuse Model.- L-Dopa-Induced Hypotension: Depression of Spinal Sympathetic Neurons by Release of 5-Hydroxytryptamine.- Antinociciptive effect of Dopaminergic Neurotransmission Evoked by Mesencephalic Stimulation on Spinal Interneuronal Activity in Cats.- The Parkinsonian Syndrome and its Dopamine Correlates.- CNS Compensation to Dopamine Neuron Loss in Parkinson\'s Disease.- Brain Dopamine Turnover and theRelief of Parkinsonism.- Evaluation of Experimental Anticholinergic Drug, Elantrine, in Treating the Tremor of Parkinsonism.- Maternally Determined Susceptibility to D-Amphetamine-Induced Stereotypyin Rats.- Postmenopausal Parkinsonism: BrainIron Overload?.- Failure of L-Dopato Relieve Activated Rigidity in Parkinson\'s Disease.- SubjectInde.