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The organization of the posterior parietal cortex devoted to upper limb actions: An fMRI study

The present fMRI study examined whether upper‐limb action classes differing in their motor goal are encoded by different PPC sectors. Action observation was used as a proxy for action execution. Subjects viewed actors performing object‐related (e.g., grasping), skin‐displacing (e.g., rubbing the ski...

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Autores principales: Ferri, Stefania, Rizzolatti, Giacomo, Orban, Guy A.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5008173/
https://www.ncbi.nlm.nih.gov/pubmed/26129732
http://dx.doi.org/10.1002/hbm.22882
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author Ferri, Stefania
Rizzolatti, Giacomo
Orban, Guy A.
author_facet Ferri, Stefania
Rizzolatti, Giacomo
Orban, Guy A.
author_sort Ferri, Stefania
collection PubMed
description The present fMRI study examined whether upper‐limb action classes differing in their motor goal are encoded by different PPC sectors. Action observation was used as a proxy for action execution. Subjects viewed actors performing object‐related (e.g., grasping), skin‐displacing (e.g., rubbing the skin), and interpersonal upper limb actions (e.g., pushing someone). Observation of the three action classes activated a three‐level network including occipito‐temporal, parietal, and premotor cortex. The parietal region common to observing all three action classes was located dorsally to the left intraparietal sulcus (DIPSM/DIPSA border). Regions specific for observing an action class were obtained by combining the interaction between observing action classes and stimulus types with exclusive masking for observing the other classes, while for regions considered preferentially active for a class the interaction was exclusively masked with the regions common to all observed actions. Left putative human anterior intraparietal was specific for observing manipulative actions, and left parietal operculum including putative human SII region, specific for observing skin‐displacing actions. Control experiments demonstrated that this latter activation depended on seeing the skin being moved and not simply on seeing touch. Psychophysiological interactions showed that the two specific parietal regions had similar connectivities. Finally, observing interpersonal actions preferentially activated a dorsal sector of left DIPSA, possibly the homologue of ventral intraparietal coding the impingement of the target person's body into the peripersonal space of the actor. These results support the importance of segregation according to the action class as principle of posterior parietal cortex organization for action observation and by implication for action execution. Hum Brain Mapp 36:3845–3866, 2015. © 2015 The Authors Human Brain Mapping Published by Wiley Periodicals, Inc.
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spelling pubmed-50081732016-09-16 The organization of the posterior parietal cortex devoted to upper limb actions: An fMRI study Ferri, Stefania Rizzolatti, Giacomo Orban, Guy A. Hum Brain Mapp Research Articles The present fMRI study examined whether upper‐limb action classes differing in their motor goal are encoded by different PPC sectors. Action observation was used as a proxy for action execution. Subjects viewed actors performing object‐related (e.g., grasping), skin‐displacing (e.g., rubbing the skin), and interpersonal upper limb actions (e.g., pushing someone). Observation of the three action classes activated a three‐level network including occipito‐temporal, parietal, and premotor cortex. The parietal region common to observing all three action classes was located dorsally to the left intraparietal sulcus (DIPSM/DIPSA border). Regions specific for observing an action class were obtained by combining the interaction between observing action classes and stimulus types with exclusive masking for observing the other classes, while for regions considered preferentially active for a class the interaction was exclusively masked with the regions common to all observed actions. Left putative human anterior intraparietal was specific for observing manipulative actions, and left parietal operculum including putative human SII region, specific for observing skin‐displacing actions. Control experiments demonstrated that this latter activation depended on seeing the skin being moved and not simply on seeing touch. Psychophysiological interactions showed that the two specific parietal regions had similar connectivities. Finally, observing interpersonal actions preferentially activated a dorsal sector of left DIPSA, possibly the homologue of ventral intraparietal coding the impingement of the target person's body into the peripersonal space of the actor. These results support the importance of segregation according to the action class as principle of posterior parietal cortex organization for action observation and by implication for action execution. Hum Brain Mapp 36:3845–3866, 2015. © 2015 The Authors Human Brain Mapping Published by Wiley Periodicals, Inc. John Wiley and Sons Inc. 2015-06-30 /pmc/articles/PMC5008173/ /pubmed/26129732 http://dx.doi.org/10.1002/hbm.22882 Text en © 2015 The Authors Human Brain Mapping Published by Wiley Periodicals, Inc. This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Research Articles
Ferri, Stefania
Rizzolatti, Giacomo
Orban, Guy A.
The organization of the posterior parietal cortex devoted to upper limb actions: An fMRI study
title The organization of the posterior parietal cortex devoted to upper limb actions: An fMRI study
title_full The organization of the posterior parietal cortex devoted to upper limb actions: An fMRI study
title_fullStr The organization of the posterior parietal cortex devoted to upper limb actions: An fMRI study
title_full_unstemmed The organization of the posterior parietal cortex devoted to upper limb actions: An fMRI study
title_short The organization of the posterior parietal cortex devoted to upper limb actions: An fMRI study
title_sort organization of the posterior parietal cortex devoted to upper limb actions: an fmri study
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5008173/
https://www.ncbi.nlm.nih.gov/pubmed/26129732
http://dx.doi.org/10.1002/hbm.22882
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