Christine Gagnon1, Carol E Greenwood, Louis Bherer. 1. Université du Québec à Montréal, Case Postale 8888, Succursale, Centre-Ville, Montréal, Québec H3C3P8, Canada. christine.gagnon@gmail.com
Abstract
RATIONALE: Glucose enhancing effects have been observed in older adults mainly for episodic memory, but have been under-investigated for attentional functions, which are very sensitive to aging. OBJECTIVE: The present study examined the acute effects of glucose ingestion on different attentional tasks in fasting healthy older adults. METHODS: In a between-subjects design, 44 participants (60 years and older) were randomly assigned to a glucose (50 g) or saccharin (placebo) condition after 12 h of fasting. Participants were tested on neuropsychological tests of attention (trail A and B, modified Stroop) and on a computerized dual-task. RESULTS: Participants in the glucose group were faster than the placebo group to complete the switching condition of the modified Stroop test (p < 0.01) and showed a smaller dual-task cost in the divided attention task (p < 0.05). CONCLUSIONS:Glucose ingestion appears to momentarily enhance attentional performances in seniors who have fasted for 12 h in tasks requiring switching and dividing attention.
RCT Entities:
RATIONALE: Glucose enhancing effects have been observed in older adults mainly for episodic memory, but have been under-investigated for attentional functions, which are very sensitive to aging. OBJECTIVE: The present study examined the acute effects of glucose ingestion on different attentional tasks in fasting healthy older adults. METHODS: In a between-subjects design, 44 participants (60 years and older) were randomly assigned to a glucose (50 g) or saccharin (placebo) condition after 12 h of fasting. Participants were tested on neuropsychological tests of attention (trail A and B, modified Stroop) and on a computerized dual-task. RESULTS:Participants in the glucose group were faster than the placebo group to complete the switching condition of the modified Stroop test (p < 0.01) and showed a smaller dual-task cost in the divided attention task (p < 0.05). CONCLUSIONS:Glucose ingestion appears to momentarily enhance attentional performances in seniors who have fasted for 12 h in tasks requiring switching and dividing attention.
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