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Paper Abstract and Keywords
Presentation 2009-07-13 16:10
Neural representation of observed action in parieto-premotor cortex -- an fMRI study with multi-voxel pattern analysis --
Kenji Ogawa (JST), Toshio Inui (JST/Kyoto Univ.) NLP2009-24 NC2009-17
Abstract (in Japanese) (See Japanese page) 
(in English) Previous research indicates that posterior parietal cortex (PPC) and ventral premotor area (PMv) has a role in understanding of other’s action. However, action selectivity that is critical for action understanding within these regions has not been elucidated. We investigated whether the parieto-premotor cortex contains information about observed actions using multi-voxel pattern analysis (MVPA) over fMRI data. Participants observed object-directed hand actions. We independently manipulated multiple dimensions of observed images: action (grasp/touch), object (cup/bottle), perspective (egocentric/allocentric), hand (right/left), and image size (large/small). Neural representation of observed actions was investigated by analyzing whether this information could be correctly decoded from multi-voxel pattern activity. Results showed that the early visual area showed significant above-chance classification accuracy in all dimensions, with particularly high accuracy in perspective, hand, and image size, which is consistent with pixel-wise dissimilarity of input images. In contrast, significant decoding accuracy was observed for action, mirror-image of hand, and object in the anterior intraparietal sulcus (aIPS), and for action and object in the PMv. Our study indicates that the parieto-premotor cortex processes observed actions in a hierarchical manner, where the aIPS represents action together with hand and object, and the PMv encodes more abstracted representations of observed action.
Keyword (in Japanese) (See Japanese page) 
(in English) fMRI / multi-voxel pattern analysis / action observation / posterior parietal cortex / premotor cortex / / /  
Reference Info. IEICE Tech. Rep., vol. 109, no. 125, NC2009-17, pp. 55-60, July 2009.
Paper # NC2009-17 
Date of Issue 2009-07-06 (NLP, NC) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
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All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034)
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Conference Information
Committee NC NLP  
Conference Date 2009-07-13 - 2009-07-14 
Place (in Japanese) (See Japanese page) 
Place (in English) NAIST 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To NC 
Conference Code 2009-07-NC-NLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Neural representation of observed action in parieto-premotor cortex 
Sub Title (in English) an fMRI study with multi-voxel pattern analysis 
Keyword(1) fMRI  
Keyword(2) multi-voxel pattern analysis  
Keyword(3) action observation  
Keyword(4) posterior parietal cortex  
Keyword(5) premotor cortex  
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1st Author's Name Kenji Ogawa  
1st Author's Affiliation Japan Science and Technology Agency (JST)
2nd Author's Name Toshio Inui  
2nd Author's Affiliation Japan Science and Technology Agency/Kyoto University (JST/Kyoto Univ.)
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Speaker Author-1 
Date Time 2009-07-13 16:10:00 
Presentation Time 30 minutes 
Registration for NC 
Paper # NLP2009-24, NC2009-17 
Volume (vol) vol.109 
Number (no) no.124(NLP), no.125(NC) 
Page pp.55-60 
#Pages
Date of Issue 2009-07-06 (NLP, NC) 


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