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bruary Sensory stimulations of the forelimb in cats are known to increase dopamine release in the ipsilateral striatum and to decrease it in the homologous contralateral structure. Using positron emission tomography in both humans and cats, the present study shows that such sensory stimulations greatly reduce [18F]FDOPA accumulation ipsilateral to the stimulation (by 40.4 % and 26.4 % in the human caudate and putamen, respectively, and by 33.3 % in the cat striatum). This decrease in striatal [18F]FDOPA uptake suggests a reduced DA storage resulting from the increased am accumulatio mode of do