%C Copenhagen, Denmark %B Neuroimage %L eprints3425 %D 1997 %A Maura L. Furey %A Barry Horwitz %A Pietro Pietrini %A Gene E. Alexander %A Marc J. Mentis %A Alessio Dani %A Umesha Shetty %A Ulderico Freo %A Stanley I. Rapoport %A Mark B. Schapiro %I Elsevier %P S623 %T Improved performance on working memory is related to regional cerebral blood flow changes induced by pharmacological modulation of the cholinergic system