%T Effect of dementia severity on the functional response to parametric visual stimulation during PET in Alzheimer disease %I Elsevier %L eprints3424 %D 1997 %P S343 %A Marc J. Mentis %A Gene E. Alexander %A Maura L. Furey %A B. Levine %A K. Prasad %A Jack Krasuki %A Pietro Pietrini %A Mark B. Schapiro %A Stanley I. Rapoport %B Neuroimage %C Copenhagen, Denmark