macpherson-hippocampalinvolvement-2015.pdf (430.85 kB)
Hippocampal involvement in glucose facilitation of recognition memory: event-related potential components in a dual-task paradigm
journal contribution
posted on 2015-01-01, 00:00 authored by Andrew Scholey, David Camfield, Helen MacphersonHelen Macpherson, Lauren Owen, Philip Nguyen, Con Stough, Leigh RibyBACKGROUND: Glucose administration may facilitate hippocampus-mediated recognition memory (‘remember’ rather than
familiarity ‘know’ responses).
OBJECTIVE: This study aimed to investigate the electrophysiological correlates of this phenomenon in a cohort of older
individuals.
METHODS: In this double-blind placebo-controlled cross-over study, 12 older participants (mean age = 69.33 ± 1.69 years)
completed the remember-know paradigm both with and without a concurrent tracking task while recording event-related
potentials (ERPs).
RESULTS: Counter to predictions, glucose reduced overall accuracy. No treatment effects were found for proportion of Remember,
Know and Guess responses, although there was a trend towards greater accuracy for ‘Remember’ responses following
glucose. There was weak evidence for dissociation of drink effects on tracking with glucose being associated with preferential
allocation of resources to ‘Remember’ over ‘Know’ responses. At P3 and F3 electrode sites, a significantly greater left parietal
(LP) recollection effect and greater FN400 effect respectively were found for glucose.
CONCLUSIONS: These findings do not support task effort modulation of the memory-enhancing effects of glucose. There
was evidence of a greater glucose facilitatory effect for hippocampus-mediated LP recollection.
familiarity ‘know’ responses).
OBJECTIVE: This study aimed to investigate the electrophysiological correlates of this phenomenon in a cohort of older
individuals.
METHODS: In this double-blind placebo-controlled cross-over study, 12 older participants (mean age = 69.33 ± 1.69 years)
completed the remember-know paradigm both with and without a concurrent tracking task while recording event-related
potentials (ERPs).
RESULTS: Counter to predictions, glucose reduced overall accuracy. No treatment effects were found for proportion of Remember,
Know and Guess responses, although there was a trend towards greater accuracy for ‘Remember’ responses following
glucose. There was weak evidence for dissociation of drink effects on tracking with glucose being associated with preferential
allocation of resources to ‘Remember’ over ‘Know’ responses. At P3 and F3 electrode sites, a significantly greater left parietal
(LP) recollection effect and greater FN400 effect respectively were found for glucose.
CONCLUSIONS: These findings do not support task effort modulation of the memory-enhancing effects of glucose. There
was evidence of a greater glucose facilitatory effect for hippocampus-mediated LP recollection.
History
Journal
Nutrition and agingVolume
3Issue
1Pagination
9 - 20Publisher
IOS PressLocation
Amsterdam, The NetherlandsPublisher DOI
Link to full text
ISSN
1879-7717eISSN
1879-7725Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2015, IOS Press and the authors.Usage metrics
Categories
No categories selectedLicence
Exports
RefWorks
BibTeX
Ref. manager
Endnote
DataCite
NLM
DC