| Does observation of postural imbalance induce a postural reaction? | |
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MedLine Citation:
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PMID: 21423622 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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BACKGROUND: Several studies bring evidence that action observation elicits contagious responses during social interactions. However automatic imitative tendencies are generally inhibited and it remains unclear in which conditions mere action observation triggers motor behaviours. In this study, we addressed the question of contagious postural responses when observing human imbalance. METHODOLOGY/PRINCIPAL FINDINGS: We recorded participants' body sway while they observed a fixation cross (control condition), an upright point-light display of a gymnast balancing on a rope, and the same point-light display presented upside down. Our results showed that, when the upright stimulus was displayed prior to the inverted one, centre of pressure area and antero-posterior path length were significantly greater in the upright condition compared to the control and upside down conditions. CONCLUSIONS/SIGNIFICANCE: These results demonstrate a contagious postural reaction suggesting a partial inefficiency of inhibitory processes. Further, kinematic information was sufficient to trigger this reaction. The difference recorded between the upright and upside down conditions indicates that the contagion effect was dependent on the integration of gravity constraints by body kinematics. Interestingly, the postural response was sensitive to habituation, and seemed to disappear when the observer was previously shown an inverted display. The motor contagion recorded here is consistent with previous work showing vegetative output during observation of an effortful movement and could indicate that lower level control facilitates contagion effects. |
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Authors:
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Banty Tia; Arnaud Saimpont; Christos Paizis; France Mourey; Luciano Fadiga; Thierry Pozzo |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2011-03-15 |
Journal Detail:
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Title: PloS one Volume: 6 ISSN: 1932-6203 ISO Abbreviation: PLoS ONE Publication Date: 2011 |
Date Detail:
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Created Date: 2011-03-22 Completed Date: 2011-07-05 Revised Date: 2011-07-27 |
Medline Journal Info:
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Nlm Unique ID: 101285081 Medline TA: PLoS One Country: United States |
Other Details:
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Languages: eng Pagination: e17799 Citation Subset: IM |
Affiliation:
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INSERM U887, Motricité et Plasticité, Université de Bourgogne, Dijon, France. banty.tia@u-bourgogne.fr |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Female Humans Light Male Movement / physiology Physical Stimulation Postural Balance / physiology* Posture / physiology* Pressure Young Adult |
| Comments/Corrections | |
Erratum In:
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PLoS One. 2011;6(3). doi: 10.1371/annotation/aff2c1f3-08af-4a36-bf53-0df2bfd9c320 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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