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search engines. OCR for page 3 Colloquium on Neuroimaging of
Human Brain Function This paper was presented at a colloquium
entitled “Neuroimaging of Human Brain Function” organized by
Michael Posner and Marcus E.Raichle, held May 29–31, 1997,
sponsored by the National Academy of Sciences at the Arnold and
Mabel Beckman Center in Irvine, CA. Behind the scenes of
functional brain imaging: A historical and physiological
perspective MARCUS E.RAICHLE† W