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Paper Abstract and Keywords
Presentation 2025-03-06 14:50
Analysis of simultaneous encoding of contour features using V4 model neurons.
Taisei Hara, Motofumi Shishikura, Ko Sakai (Tsukuba Univ.) NC2024-74
Abstract (in Japanese) (See Japanese page) 
(in English) The visual cortical area V4 is located in the middle of the ventral visual pathway, where visual information related to object recognition is processed. It plays a crucial role in the integration of multiple contour features and the formation of intermediate object representations. Recent research (Machida et al., eNeuro, 2024) analyzed the responses of macaque V4 neurons to natural images and showed that V4 neurons simultaneously encode multiple features of the contours in natural images. This suggests that V4 neurons prefer complex contours that cannot be expressed by the traditional combination of single curvature and orientation. In this study, an image generation framework using a genetic algorithm (Ponce et al., Cell, 2019) and model neurons (Bashivan et al., Science, 2019) was used to estimate the optimal contour stimuli. By dividing the estimated optimal contour based on curvature and combining the divided contours as input to the model, it was found that the model's response increased by the number of combined contours. This result suggests that V4 neurons encode complex contour patterns represented by combinations of multiple curvatures.
Keyword (in Japanese) (See Japanese page) 
(in English) Object Recognition / Ventral Visual Pathway / V4 / Neural Response Prediction Model / Simulation / Genetic Algorithm / /  
Reference Info. IEICE Tech. Rep., vol. 124, no. 413, NC2024-74, pp. 73-76, March 2025.
Paper # NC2024-74 
Date of Issue 2025-02-26 (NC) 
ISSN 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 NC2024-74

Conference Information
Committee NC MBE  
Conference Date 2025-03-05 - 2025-03-07 
Place (in Japanese) (See Japanese page) 
Place (in English)  
Topics (in Japanese) (See Japanese page) 
Topics (in English) Brain architecture, General 
Paper Information
Registration To NC 
Conference Code 2025-03-NC-MBE 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Analysis of simultaneous encoding of contour features using V4 model neurons. 
Sub Title (in English) * 
Keyword(1) Object Recognition  
Keyword(2) Ventral Visual Pathway  
Keyword(3) V4  
Keyword(4) Neural Response Prediction Model  
Keyword(5) Simulation  
Keyword(6) Genetic Algorithm  
Keyword(7)  
Keyword(8)  
1st Author's Name Taisei Hara  
1st Author's Affiliation Tsukuba University (Tsukuba Univ.)
2nd Author's Name Motofumi Shishikura  
2nd Author's Affiliation Tsukuba University (Tsukuba Univ.)
3rd Author's Name Ko Sakai  
3rd Author's Affiliation Tsukuba University (Tsukuba Univ.)
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Speaker Author-1 
Date Time 2025-03-06 14:50:00 
Presentation Time 25 minutes 
Registration for NC 
Paper # NC2024-74 
Volume (vol) vol.124 
Number (no) no.413 
Page pp.73-76 
#Pages 4 
Date of Issue 2025-02-26 (NC) 

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