| Behavioral and neural correlates of communication via pointing. | |
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MedLine Citation:
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PMID: 21423659 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Communicative pointing is a human specific gesture which allows sharing information about a visual item with another person. It sets up a three-way relationship between a subject who points, an addressee and an object. Yet psychophysical and neuroimaging studies have focused on non-communicative pointing, which implies a two-way relationship between a subject and an object without the involvement of an addressee, and makes such gesture comparable to touching or grasping. Thus, experimental data on the communicating function of pointing remain scarce. Here, we examine whether the communicative value of pointing modifies both its behavioral and neural correlates by comparing pointing with or without communication. We found that when healthy participants pointed repeatedly at the same object, the communicative interaction with an addressee induced a spatial reshaping of both the pointing trajectories and the endpoint variability. Our finding supports the hypothesis that a change in reference frame occurs when pointing conveys a communicative intention. In addition, measurement of regional cerebral blood flow using H(2)O(15) PET-scan showed that pointing when communicating with an addressee activated the right posterior superior temporal sulcus and the right medial prefrontal cortex, in contrast to pointing without communication. Such a right hemisphere network suggests that the communicative value of pointing is related to processes involved in taking another person's perspective. This study brings to light the need for future studies on communicative pointing and its neural correlates by unraveling the three-way relationship between subject, object and an addressee. |
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Authors:
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Laurent Cleret de Langavant; Philippe Remy; Iris Trinkler; Joseph McIntyre; Emmanuel Dupoux; Alain Berthoz; Anne-Catherine Bachoud-Lévi |
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Publication Detail:
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Type: Journal Article 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: e17719 Citation Subset: IM |
Affiliation:
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INSERM U955, Equipe 1, Neuropsychologie Interventionnelle, Institut Mondor de Recherche Biomédicale, Créteil, France. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adult Behavior / physiology* Brain Mapping Communication* Female Humans Male Nerve Net / physiology* Positron-Emission Tomography |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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