A preliminary fluorodeoxyglucose positron emission tomography study in healthy adults reportinq dream-enactment behavior

Richard J. Caselli, Kewei Chen, Dan Bandy, Oded Smilovici, Bradley F. Boeve, David Osborne, Gene E. Alexander, James M. Parish, Lois E. Krahn, Eric M. Reiman

Research output: Contribution to journalArticlepeer-review

41 Scopus citations


Study Objectives: To test the hypothesis that healthy adults reporting dream-enactment behavior (DEB+) have reduced cerebral metabolic rate for glucose (CMRgI) in regions preferentially affected in patients with dementia with Lewy bodies (DLB). Design: Automated brain-mapping algorithms were used to compare regional fluorodeoxyglucose (FDG) positron emission tomography (PET) measurements from previously evaluated DEB cases and controls. Setting: Tertiary-care academic medical centers. Participants: Seventeen cognitively normal patients with DEB+ and 17 control subjects (DEB-) who were individually matched for age (59 ± 11 years), education level (16 ± 4 years), sex (67% women), body mass index (26 ± 4.8 kg/m2), first-degree relative with dementia (85%), and proportion of apolipoprotein E (APOE) e4 carriers (13 e4 carriers, 4 noncarriers). Interventions: FDG-PET. Measurements and Results: DEB was associated with significantly lower CMRgI in several brain regions known to be preferentially affected in both DLB and Alzheimer disease (parietal, temporal, and posterior cingulate cortexes) and in several other regions, including the anterior cingulate cortex (p < .001, uncorrected for multiple comparisons). The DEB-associated CMRgI reductions were significantly greater in the APOE e4 noncarriers than in the carriers. Conclusions: These preliminary findings suggest that cognitively normal persons with DEB have reduced CMRgI in brain regions known to be metabolically affected by DLB, supporting further study of DEB as a possible risk factor for the development of DLB.

Original languageEnglish (US)
Pages (from-to)927-933
Number of pages7
Issue number7
StatePublished - Jul 1 2006


  • Dementia with Lewy bodies
  • Preclinical dementia
  • REM sleep behavior disorder

ASJC Scopus subject areas

  • Clinical Neurology
  • Physiology (medical)


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