Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/30805
Appears in Collections:Psychology Journal Articles
Peer Review Status: Refereed
Title: Neural responses to dynamic adaptation reveal the dissociation between the processing of the shape of contours and textures
Author(s): Wright, Damien
Dering, Benjamin
Martinovic, Jasna
Gheorghiu, Elena
Contact Email: elena.gheorghiu@stir.ac.uk
Keywords: Experimental and Cognitive Psychology
Cognitive Neuroscience
Neuropsychology and Physiological Psychology
Issue Date: Jun-2020
Citation: Wright D, Dering B, Martinovic J & Gheorghiu E (2020) Neural responses to dynamic adaptation reveal the dissociation between the processing of the shape of contours and textures. Cortex, 127, pp. 78-93. https://doi.org/10.1016/j.cortex.2020.01.015
Abstract: Shape-adaptation studies show that surround textures can inhibit the processing of contours. Using event-related potentials (ERP), we examined the time-course of neural processes involved in contour-shape and texture-shape processing following adaptation to contours and textures. Contours were made of Gabor strings whose orientations were either tangential or orthogonal to the contour path, while textures were made of a series of contours arranged in parallel. We focused on two ERP components –P1, related to low-level visual processes and N1, broadly indicative of mid-level vision– and, on ERP difference waves (no-adaptor minus with-adaptor) to isolate the effects of adaptation, which are fundamentally distinct from individual processes driving P1 and N1 components. We found that in the absence of adaptation, the N1 component for contour-tests peaked later and increased in amplitude compared to the N1 for texture-tests. Following adaptation, the ERP difference wave for contour-tests revealed an early and a late component that were differentially affected by the presence of surround texture, but critically not by its orientation. For texture-tests, the early component was of opposite polarity for contours compared to texture adaptors. From the temporal sequence of ERP modulations, we conclude that texture processing begins before contour processing and encompasses the stages of perceptual processing reflected in both the low-level P1 and the mid-level N1 vision-related components. Our study provides novel evidence on the nature of separable and temporally distinct texture and contour processing mechanisms, shown in two difference wave components, that highlights the multi-faceted nature of dynamic adaptation to shape when presented in isolation and in context.
DOI Link: 10.1016/j.cortex.2020.01.015
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[Wright2020Neural-responses-to-dynamic-adaptation.pdf] This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. Please cite this article as: Wright D, Dering B, Martinovic J, Gheorghiu E, Neural responses to dynamic adaptation reveal the dissociation between the processing of the shape of contours and textures, CORTEX, 127, pp. 78-93 https://doi.org/10.1016/j.cortex.2020.01.015. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/
Notes: Please use the following link to access the article at the publisher's website: https://authors.elsevier.com/a/1ailv_FxMcCVO This link provides 50 days' free access to the article. Anyone clicking on this link before April 29, 2020 will be taken directly to the final version of the article on ScienceDirect, which they are welcome to read or download. No sign up, registration or fees are required.
Licence URL(s): http://creativecommons.org/licenses/by-nc-nd/4.0/

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