### Introduction The history of brain imaging has paralleled the growth of the Society for Neuroscience, from its inception in 1973 with the introduction of x-ray computed tomography (CT) to the present (for a historical review, see [Webb, 1990][1]; [Kevles, 1997][2]; [Raichle, 2000][3]; [Raichle,
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Marcus E. Raichle (2009) studied this question.
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