Information: Join today and make your research activities more affordable! Technical workshop participation fees and annual registration fees are available at member rates.
Notice: [Important] Announcement of Changes to Registration Fee Payment and Manuscript Upload Procedures for IEICE Technical Meetings
IEICE Technical Committee Submission System
Conference Paper's Information		 Online Proceedings
[Sign in]
Tech. Rep. Archives
 Go Top Page Go Previous   [Japanese] / [English] 

Paper Abstract and Keywords
Presentation 2011-01-24 17:10
Neural representation of object-centered coordinates in humans -- an fMRI study --
Kenji Ogawa (JST), Toshio Inui (JST/Kyoto Univ.) NLP2010-137 NC2010-101
Abstract (in Japanese) (See Japanese page) 
(in English) Several types of reference frames exist in the human brain. Previous neuropsychological case studies of hemi-neglect, in which the patient often neglects the left side of visually presented objects, have indicated the existence of neural representation of object-based coordinates in humans. The parieto-premotor regions, especially those of the right hemisphere, have consistently been reported as responsible for hemi-neglect. However, whether these areas represent visually presented stimuli in an object-centered reference frame remains unclear. We aimed to reveal neural representation of object-based coordinates in humans, using functional MRI (fMRI) together with multi-voxel pattern analysis (MVPA). In our experiment, participants were presented with visual stimuli consisting of two crossed lines, and they judged whether the vertical line was located to the left or right of a central fixation point (retinotopic coordinates) or a horizontal line of the stimulus (object-centered coordinates). For MVPA, we tried to classify the two possible positions (left or right) in either retinal- or object-based coordinates using multi-voxel pattern activities of regions of interest (ROIs). The linear support vector machine (SVM) was used as a classifier. A significantly above-chance decoding accuracy was found in the early visual areas, bilaterally, for retinal coordinates. In contrast, significant classification accuracies for object-centered coordinates were found in the ventral premotor cortex (PMv) in the right hemisphere, which were independent of retinal coordinates as well as a shift in visuo-spatial attention. Taken together, these findings suggest the existence of an object-centered reference frame in the right PMv.
Keyword (in Japanese) (See Japanese page) 
(in English) fMRI / multi-voxel pattern analysis (MVPA) / object-centered coordinates / ventral premotor cortex (PMv) / / / /  
Reference Info. IEICE Tech. Rep., vol. 110, no. 388, NC2010-101, pp. 75-80, Jan. 2011.
Paper # NC2010-101 
Date of Issue 2011-01-17 (NLP, NC) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
and
reproduction		 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)
Download PDF NLP2010-137 NC2010-101

Conference Information
Committee NC NLP  
Conference Date 2011-01-24 - 2011-01-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Hokakido Univ. 
Topics (in Japanese) (See Japanese page) 
Topics (in English)  
Paper Information
Registration To NC 
Conference Code 2011-01-NC-NLP 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Neural representation of object-centered coordinates in humans 
Sub Title (in English) an fMRI study 
Keyword(1) fMRI  
Keyword(2) multi-voxel pattern analysis (MVPA)  
Keyword(3) object-centered coordinates  
Keyword(4) ventral premotor cortex (PMv)  
Keyword(5)  
Keyword(6)  
Keyword(7)  
Keyword(8)  
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.)
3rd Author's Name  
3rd Author's Affiliation ()
4th Author's Name  
4th Author's Affiliation ()
5th Author's Name  
5th Author's Affiliation ()
6th Author's Name  
6th Author's Affiliation ()
7th Author's Name  
7th Author's Affiliation ()
8th Author's Name  
8th Author's Affiliation ()
9th Author's Name  
9th Author's Affiliation ()
10th Author's Name  
10th Author's Affiliation ()
11th Author's Name  
11th Author's Affiliation ()
12th Author's Name  
12th Author's Affiliation ()
13th Author's Name  
13th Author's Affiliation ()
14th Author's Name  
14th Author's Affiliation ()
15th Author's Name  
15th Author's Affiliation ()
16th Author's Name  
16th Author's Affiliation ()
17th Author's Name  
17th Author's Affiliation ()
18th Author's Name  
18th Author's Affiliation ()
19th Author's Name  
19th Author's Affiliation ()
20th Author's Name  
20th Author's Affiliation ()
21st Author's Name  
21st Author's Affiliation ()
22nd Author's Name  
22nd Author's Affiliation ()
23rd Author's Name  
23rd Author's Affiliation ()
24th Author's Name  
24th Author's Affiliation ()
25th Author's Name  
25th Author's Affiliation ()
26th Author's Name / /
26th Author's Affiliation ()
()
27th Author's Name / /
27th Author's Affiliation ()
()
28th Author's Name / /
28th Author's Affiliation ()
()
29th Author's Name / /
29th Author's Affiliation ()
()
30th Author's Name / /
30th Author's Affiliation ()
()
31st Author's Name / /
31st Author's Affiliation ()
()
32nd Author's Name / /
32nd Author's Affiliation ()
()
33rd Author's Name / /
33rd Author's Affiliation ()
()
34th Author's Name / /
34th Author's Affiliation ()
()
35th Author's Name / /
35th Author's Affiliation ()
()
36th Author's Name / /
36th Author's Affiliation ()
()
Speaker Author-1 
Date Time 2011-01-24 17:10:00 
Presentation Time 25 minutes 
Registration for NC 
Paper # NLP2010-137, NC2010-101 
Volume (vol) vol.110 
Number (no) no.387(NLP), no.388(NC) 
Page pp.75-80 
#Pages 6 
Date of Issue 2011-01-17 (NLP, NC) 

[Return to Top Page]

[Return to IEICE Web Page]
The Institute of Electronics, Information and Communication Engineers (IEICE), Japan