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Glucose administration and cognitive function: differential effects of age and effort during a dual task paradigm in younger and older adults.

journal contribution
posted on 2015-03-01, 00:00 authored by Helen MacphersonHelen Macpherson, B Roberstson, S Sünram-Lea, C Stough, D Kennedy, A Scholey
RATIONALE: Current research suggests that glucose facilitates performance on cognitive tasks which possess an episodic memory component and a relatively high level of cognitive demand. However, the extent to which this glucose facilitation effect is uniform across the lifespan is uncertain. METHODS: This study was a repeated measures, randomised, placebo-controlled, cross-over trial designed to assess the cognitive effects of glucose in younger and older adults under single and dual task conditions. Participants were 24 healthy younger (average age 20.6 years) and 24 healthy older adults (average age 72.5 years). They completed a recognition memory task after consuming drinks containing 25 g glucose and a placebo drink, both in the presence and absence of a secondary tracking task. RESULTS AND CONCLUSIONS: Glucose enhanced recognition memory response time and tracking precision during the secondary task, in older adults only. These findings do not support preferential targeting of hippocampal function by glucose, rather they suggest that glucose administration differentially increases the availability of attentional resources in older individuals.

History

Journal

Psychopharmacology

Volume

232

Pagination

1135-1142

Location

Berlin, Germany

eISSN

1432-2072

Language

eng

Publication classification

C Journal article, C1.1 Refereed article in a scholarly journal

Copyright notice

2015, Springer Verlag

Issue

6

Publisher

Springer

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