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Galvanic vestibular stimulation increases novelty in free selection of manual actions

Ferrè, ER; Arthur, K; Haggard, P; (2013) Galvanic vestibular stimulation increases novelty in free selection of manual actions. Frontiers in Integrative Neuroscience , 7 , Article 74. 10.3389/fnint.2013.00074. Green open access

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Abstract

Making optimal choices in changing environments implies the ability to balance routine, exploitative patterns of behavior with novel, exploratory ones. We investigated whether galvanic vestibular stimulation (GVS) interferes with the balance between exploratory and exploitative behaviors in a free action selection task. Brief right-anodal and left-cathodal GVS or left-anodal and right-cathodal GVS were delivered at random to activate sensorimotor circuits in the left and right hemisphere, respectively. A sham stimulation condition was included. Participants endogenously generated sequences of possible actions, by freely choosing successive movements of the index or middle finger of the left or right hand. Left-anodal and right-cathodal GVS, which preferentially activates the vestibular projections in the right cerebral hemisphere, increased the novelty in action sequences, as measured by the number of runs in the sequences. In contrast, right-anodal and left-cathodal GVS decreased the number of runs. There was no evidence of GVS-induced spatial bias in action choices. Our results confirm previous reports showing a polarity-dependent effect of GVS on the balance between novel and routine responses, and thus between exploratory and exploitative behaviors.

Type: Article
Title: Galvanic vestibular stimulation increases novelty in free selection of manual actions
Location: Switzerland
Open access status: An open access version is available from UCL Discovery
DOI: 10.3389/fnint.2013.00074
Publisher version: http://dx.doi.org/10.3389/fnint.2013.00074
Language: English
Additional information: PMCID: PMC3817628 This is an open-access article distributed under the terms of the Creative Commons Attribution License[http://creativecommons.org/licenses/by/4.0/], which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Keywords: action selection, exploitation, exploration, galvanic vestibular stimulation, hemispheric specialization, novelty
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Institute of Cognitive Neuroscience
URI: https://discovery.ucl.ac.uk/id/eprint/1421177
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