Sven Haller1,2, Marie-Louise Montandon3, Cristelle Rodriguez3, Dominik Moser3, Simona Toma3, Jeremy Hofmeister3, Panteleimon Giannakopoulos3. 1. Affidea Centre de Diagnostic Radiologique de Carouge CDRC, Clos de la Fonderie 1, 1277 Carouge, Geneva, Switzerland. sven.haller@gmail.com. 2. Department of Surgical Sciences, Radiology, Uppsala University, Uppsala, Sweden. sven.haller@gmail.com. 3. Department of Psychiatry, Faculty of Medicine, Medical Direction, University Hospitals of Geneva, Geneva, Switzerland.
Abstract
PURPOSE: Recent evidence indicates that caffeine may have a beneficial effect on cognitive decline and dementia. The current investigation assessed the effect of acute caffeine administration on working memory during the earliest stage of cognitive decline in elderly participants. METHODS: The study includes consecutive 45 elderly controls and 18 individuals with mild cognitive impairment (MCI, 71.6 ± 4.7 years, 7 females). During neuropsychological follow-up at 18 months, 24 controls remained stable (sCON, 70.0 ± 4.3 years, 11 women), while the remaining 21 showed subtle cognitive deterioration (dCON, 73.4 ± 5.9 years, 14 women). All participants underwent an established 2-back working task in a crossover design of 200 mg caffeine versus placebo. Data analysis included task-related general linear model and functional connectivity tensorial independent component analysis. RESULTS:Working memory behavioral performances did not differ between sCON and dCON, while MCI was slower and less accurate than both control groups (p < 0.05). The dCON group had a less pronounced effect of acute caffeine administration essentially restricted to the right hemisphere (p < 0.05 corrected) and reduced default mode network (DMN) deactivation compared to sCON (p < 0.01 corrected). CONCLUSION:dCON cases are characterized by decreased sensitivity to caffeine effects on brain activation and DMN deactivation. These complex fMRI patterns possibly reflect the instable status of these cases with intact behavioral performances despite already existing functional alterations in neocortical circuits.
RCT Entities:
PURPOSE: Recent evidence indicates that caffeine may have a beneficial effect on cognitive decline and dementia. The current investigation assessed the effect of acute caffeine administration on working memory during the earliest stage of cognitive decline in elderly participants. METHODS: The study includes consecutive 45 elderly controls and 18 individuals with mild cognitive impairment (MCI, 71.6 ± 4.7 years, 7 females). During neuropsychological follow-up at 18 months, 24 controls remained stable (sCON, 70.0 ± 4.3 years, 11 women), while the remaining 21 showed subtle cognitive deterioration (dCON, 73.4 ± 5.9 years, 14 women). All participants underwent an established 2-back working task in a crossover design of 200 mg caffeine versus placebo. Data analysis included task-related general linear model and functional connectivity tensorial independent component analysis. RESULTS:Working memory behavioral performances did not differ between sCON and dCON, while MCI was slower and less accurate than both control groups (p < 0.05). The dCON group had a less pronounced effect of acute caffeine administration essentially restricted to the right hemisphere (p < 0.05 corrected) and reduced default mode network (DMN) deactivation compared to sCON (p < 0.01 corrected). CONCLUSION:dCON cases are characterized by decreased sensitivity to caffeine effects on brain activation and DMN deactivation. These complex fMRI patterns possibly reflect the instable status of these cases with intact behavioral performances despite already existing functional alterations in neocortical circuits.
Authors: Elissa B Klaassen; Renate H M de Groot; Elisabeth A T Evers; Jan Snel; Enno C I Veerman; Antoon J M Ligtenberg; Jelle Jolles; Dick J Veltman Journal: Neuropharmacology Date: 2012-06-21 Impact factor: 5.250
Authors: Kim A Celone; Vince D Calhoun; Bradford C Dickerson; Alireza Atri; Elizabeth F Chua; Saul L Miller; Kristina DePeau; Doreen M Rentz; Dennis J Selkoe; Deborah Blacker; Marilyn S Albert; Reisa A Sperling Journal: J Neurosci Date: 2006-10-04 Impact factor: 6.167
Authors: Joan Lindsay; Danielle Laurin; René Verreault; Réjean Hébert; Barbara Helliwell; Gerry B Hill; Ian McDowell Journal: Am J Epidemiol Date: 2002-09-01 Impact factor: 4.897