Influence of motor imagination on cortical activation during functional electrical stimulation

Reynolds, C., Osuagwu, B. A. and Vuckovic, A. (2015) Influence of motor imagination on cortical activation during functional electrical stimulation. Clinical Neurophysiology, 126(7), pp. 1360-1369. (doi: 10.1016/j.clinph.2014.10.007)

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<b>Objective</b> Motor Imagination (MI) and Functional Electrical Stimulation (FES) can activate the sensory-motor cortexthrough efferent and afferent pathways respectively. Motor Imagination can be used as a control strategy to activate FES through a Brain-computer interface as the part of a rehabilitation therapy. It is believed that precise timing between the onset of MI and FES is important for strengthening the cortico-spinal pathways but it is not known whether prolonged MI during FES influences cortical response.<p></p> <b>Methods</b> Electroencephalogram was measured in ten able-bodied participants using MI strategy to control FES through a BCI system. Event related synchronisation/desynchronisation (ERS/ERD) over the sensory-motor cortex was analysed and compared in three paradigms: MI before FES, MI before and during FES and FES alone activated automatically.<p></p> <b>Results</b> MI practiced both before and during FES produced strongest ERD. When MI only preceded FES it resulted in a weaker beta ERD during FES than when FES was activated automatically. Following termination of FES, beta ERD returns to the baseline level within 0.5 s while alpha ERD took longer than 1 s.<p></p> <b>Conclusions</b> When MI and FES are combined for rehabilitation purposes it is recommended that MI is practiced throughout FES activation period.<p></p> <b>Significance</b> The study is relevant for neurorehabilitation of movement.<p></p>

Item Type:Articles
Glasgow Author(s) Enlighten ID:Vuckovic, Dr Aleksandra
Authors: Reynolds, C., Osuagwu, B. A., and Vuckovic, A.
College/School:College of Science and Engineering > School of Engineering > Biomedical Engineering
Journal Name:Clinical Neurophysiology
Publisher:Elsevier Ireland Ltd.
ISSN (Online):1872-8952
Copyright Holders:Copyright © 2014 International Federation of Clinical Neurophysiology
First Published:First published in Clinical Neurophysiology 126(7):1360-1369
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
554791EPSRC Doctoral Training Grant 2010-14Mary Beth KneafseyEngineering & Physical Sciences Research Council (EPSRC)EP/P505534/1VICE PRINCIPAL RESEARCH & ENTERPRISE