Prismatic adaptation modulates oscillatory EEG correlates of motor preparation but not visual attention in healthy participants

Bracco, M., Veniero, D., Oliveri, M. and Thut, G. (2018) Prismatic adaptation modulates oscillatory EEG correlates of motor preparation but not visual attention in healthy participants. Journal of Neuroscience, 38(5), pp. 1189-1201. (doi: 10.1523/JNEUROSCI.1422-17.2017) (PMID:29255004)

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Prismatic adaption (PA) has been proposed as a tool to induce neural plasticity and is used to help neglect rehabilitation. It leads to a recalibration of visuo-motor coordination during pointing as well as to after-effects on a number of sensorimotor and attention tasks, but whether these effects originate at a motor or attentional level remains a matter of debate. Our aim was to further characterise PA after-effects by using an approach that allows distinguishing between effects on attentional and motor processes. We recorded electroencephalography (EEG) in healthy human participants (9 females and 7 males) while performing a new double step, anticipatory attention/motor preparation paradigm before and after adaptation to rightward shifting prisms, with neutral lenses as a control. We then examined PA after-effects through changes in known oscillatory EEG signatures of spatial attention orienting and motor preparation in the alpha and beta frequency bands. Our results were twofold. First, we found PA to rightward shifting prisms to selectively affect EEG signatures of motor but not attentional processes. More specifically, PA modulated preparatory motor EEG activity over central electrodes in the right hemisphere, contralateral to the PA-induced, compensatory leftward shift in pointing movements. No effects were found on EEG signatures of spatial attention orienting over occipito-parietal sites. Second, we found the PA effect on preparatory motor EEG activity to dominate in the beta frequency band. We conclude that changes to intentional visuo-motor rather than attentional visuo-spatial processes underlie the PA after-effect of rightward deviating prisms in healthy participants.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Thut, Professor Gregor and Bracco, Dr Martina and Veniero, Dr Domenica
Authors: Bracco, M., Veniero, D., Oliveri, M., and Thut, G.
College/School:College of Medical Veterinary and Life Sciences > School of Psychology & Neuroscience
Journal Name:Journal of Neuroscience
Publisher:Society for Neuroscience
ISSN (Online):1529-2401
Published Online:18 December 2017
Copyright Holders:Copyright © 2017 Bracco et al.
First Published:First published in Journal of Neuroscience 38:1189-1201
Publisher Policy:Reproduced under a Creative Commons License

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Project CodeAward NoProject NamePrincipal InvestigatorFunder's NameFunder RefLead Dept
597911Natural and modulated neural communication: State-dependent decoding and driving of human Brain OscillationsGregor ThutWellcome Trust (WELLCOTR)098434/Z/12/ZINP - CENTRE FOR COGNITIVE NEUROIMAGING