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An electrophysiological investigation of glucose administration effects on movement preparation and execution

Hope, C, Seiss, E, Dean, P and Sterr, A (2009) An electrophysiological investigation of glucose administration effects on movement preparation and execution In: Society for Psychophysiological Research Annual Meeting, 2009-10-21 - 2009-10-24, Berliner Congress Center, Berlin, Germany.

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Behavioural studies suggest that elevated blood glucose concentrations accelerate response times in complex tasks (Owens and Benton, 2004, Neuropsychobiology). With the present study we aimed to explore the mechanisms subserving elevated blood glucose effects (7 mmol/litre versus fasting levels of 5 mmol/litre) by studying EEG-derived indices of sensorimotor processing. More specifically, the Eriksen flanker task was used to examine glucose-dependent modulations of the P300, the stimulus lateralized readiness potentials (LRPs), and response-locked LRP, to see whether enhanced blood glucose levels affect stimulus evaluation, response planning, and response selection respectively. 10 participants took part in a within-participant double-blind 2-session experiment where either glucose (25 g) or placebo drinks were administered. Initial data suggests slower reaction times, higher error rates and delayed stimulus-locked LRP onset in incongruent compared to congruent and neutral trials. With placebo administration error rates were increased for the non-dominant hand but not the dominant hand; no effects were found for the EEG parameters. This suggests that hyperglycaemia does not affect senorimotor processing in the flanker task. However, the placebo-related increase in error rates together with the findings of (Donohoe and Benton, 2000) support the proposition that beneficial effects of increased blood glucose levels on cognition might only occur when cognitive demands are high.

Item Type: Conference or Workshop Item (Conference Poster)
Divisions : Faculty of Health and Medical Sciences > School of Psychology
Authors :
Date : 11 September 2009
Identification Number : 10.1111/j.1469-8986.2009.00920.x
Contributors :
Related URLs :
Additional Information : This is the accepted version of the following article: Hope C, Seiss E, Dean P, Sterr A. An electrophysiological investigation of glucose administration effects on movement preparation and execution Society for Psychophysiological Research Annual Meeting, Berliner Congress Center, Berlin, Germany, 21 Oct 2009 - 24 Oct 2009. Psychophysiology. Special Issue: Society for Psychophysiological Research Abstracts for the Forty-Ninth Annual Meeting. Wiley-Blackwell. 46: S97. 11 Sep 2009, which has been published in final form at
Depositing User : Symplectic Elements
Date Deposited : 25 Mar 2015 18:07
Last Modified : 04 May 2015 13:33

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