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| Research article summary (published 14 Jun 2003): |
Glucose effects on a continuous performance test of attention in adults.
Full Abstract
Increases in plasma blood glucose levels modulate memory, mood, and, to some extent, attention in adults. Participants in the present study were administered glucose (10, 100, and 500 mg/kg, or 50 g) or placebo (23.7 mg saccharin) shortly prior to completing the test of variables of attention (TOVA), a continuous performance test (CPT) commonly used to assess attention for diagnostic purposes. There were significant increases in blood glucose levels for the 500 mg/kg and 50 g groups, but only the 100 mg/kg group showed significant changes in behavior in comparison to the saccharin group. Specifically, the 100 mg/kg group performed worse on measures of commission errors, post-commission responses, and post-commission response time variability. There were no differences among the groups on other major variables of attention, including omission errors, response time, and response time variability. The results of this study demonstrate that large doses of glucose which increase blood glucose levels do not influence attention, but that a moderate dose (100 mg/kg) selectively impairs measures of impulsivity or disinhibition. Practitioners and researchers should maintain an awareness of dietary effects on attention and continue to examine micronutrients as potential confounds on diagnostic tests of cognition and behavior.
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Author information
Author/s: Flint, Robert W (RW); Turek, Crystal (C);
Affiliation: Department of Psychology, The College of Saint Rose, 432 Western Avenue, Albany, NY 12203-1490, USA. flintr@mail.strose.edu
Journal and publication information
Publication Type: Clinical Trial; Controlled Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't
Journal: Behavioural brain research (Behav Brain Res), published in Netherlands. (Language: eng)
Reference: 2003-Jun; vol 142 (issue 1-2) : pp 217-28
Dates: Created 2003/06/11; Completed 2003/09/30; Revised 2006/11/15;
PMID: 12798283, status: MEDLINE (last retrieval date: 11/6/2008)
Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.
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