NDLI: Attention influence response in the human visual area V1 for Ebbinghaus illusion

Content Provider	IEEE Xplore Digital Library
Author	Tianyi Yan Bin Wang Yamasita, Y. Bing Yu Qiyong Guo Jinglong Wu
Copyright Year	2011
Description	Author affiliation: Shengjing Hospital of China Medical University, 36 No.3 Street, Heping District, Liaoning, China (Bing Yu; Qiyong Guo) \|\| The Graduate School of Natural Science and Technology, Okayama University, 1-1 Tsushima-naka, 3-Chome, Japan (Tianyi Yan; Bin Wang; Yamasita, Y.; Jinglong Wu)
Abstract	Early visual areas encode visual information in retinotopic coordinates, signaling retinotopic size and orientation properties. One of the most fundamental properties of human primary visual cortex (V1) is its retinotopic organization, whichmakes it an ideal candidate for encoding spatial properties, such as size, of objects. However, Ebbinghaus contextual information can lead to size illusions that are reflected in the spatial pattern of activity in V1. Here we used fMRI to measure BOLD response to a variant of the Ebbinghaus illusion to test where visual information processing starts to encode relative, opposed to retinotopic, sizes. The stimulus consisted of a white test disk on a black background display whose fixation attention, central attention or illusion than the test disk. We chose this same kind of the Ebbinghaus illusion to measure BOLD response differences due to changes in the attention. Psychophysical comparison with the traditional Ebbinghaus illusion showed that the strength of the illusion in our variant was comparable. Comparison of BOLD response across conditions (lager inducers vs. small inducers) revealed illusion related activity in the intraoccipital sulcus (IOS), the middle temporal gyrus and the temporal pole. The IOS and the posterior middle temporal activation may relate to attention position that the Ebbinghaus illusion is related to textural attention. The temporal pole activation may relate to categorical object processing. Our result is consistent with the notion that the Ebbinghaus illusion results from attention influence. This effect was significantly reduced when the focus of spatial attention was narrowed with a demanding fixation and central attention task. We reason that focusing attention on the fixation task resulted in reduced activity in. and therefore reduced feedback from higher visual areas that process the Ebbinghaus illusion.
Starting Page	582
Ending Page	587
File Size	1402393
Page Count	6
File Format	PDF
ISBN	9781424493234
e-ISBN	9781424493241
DOI	10.1109/ICCME.2011.5876808
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2011-05-22
Publisher Place	China
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Visualization Atmospheric measurements Psychology Particle measurements Mechanical factors Analysis of variance
Content Type	Text
Resource Type	Article

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