New societies arise and new journals appear when there is a need for them, that is, when the scientific community within a particular field has grown to become large and strong enough to support them. The International Society for Cerebral Blood flow & Metabolism and the Journal of Cerebral Blood Flow and Metabolism are no exceptions. At the time of their inception, a new field had been growing for a while. Novel methods had been developed to measure changes in cerebral blood flow and metabolism in animals and man, paving the way for the first studies of functional neuroimaging in humans. Newcomers to the neurosciences may think that functional magnetic resonance imaging was the starting point, but this is not the case. The first fascinating stories of brain function in relation to motor function, language, and cognition in humans were told with methodologies that used radioactive tracers, and consequently publications using positron emission tomography techniques still constitute a substantial part of the Journal's content.
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