Research Repository

Representation of Maximally Regular Textures in Human Visual Cortex

Kohler, Peter J and Clarke, Alasdair DF and Yakovleva, Alexandra and Liu, Yanxi and Norcia, Anthony M (2016) 'Representation of Maximally Regular Textures in Human Visual Cortex.' Journal of Neuroscience, 36 (3). pp. 714-729. ISSN 0270-6474

714.full.pdf - Published Version
Available under License Creative Commons Attribution.

Download (3MB) | Preview


Naturalistic textures with an intermediate degree of statistical regularity can capture key structural features of natural images (Freeman and Simoncelli, 2011). V2 and later visual areas are sensitive to these features, while primary visual cortex is not (Freeman et al., 2013). Here we expand on this work by investigating a class of textures that have maximal formal regularity, the 17 crystallographic wallpaper groups (Fedorov, 1891). We used texture stimuli from four of the groups that differ in the maximum order of rotation symmetry they contain, and measured neural responses in human participants using functional MRI and high-density EEG. We found that cortical area V3 has a parametric representation of the rotation symmetries in the textures that is not present in either V1 or V2, the first discovery of a stimulus property that differentiates processing in V3 from that of lower-level areas. Parametric responses were also seen in higher-order ventral stream areas V4, VO1, and lateral occipital complex (LOC), but not in dorsal stream areas. The parametric response pattern was replicated in the EEG data, and source localization indicated that responses in V3 and V4 lead responses in LOC, which is consistent with a feedforward mechanism. Finally, we presented our stimuli to four well developed feedforward models and found that none of them were able to account for our results. Our results highlight structural regularity as an important stimulus dimension for distinguishing the early stages of visual processing, and suggest a previously unrecognized role for V3 in the visual form-processing hierarchy.

Item Type: Article
Uncontrolled Keywords: Visual Cortex; Visual Pathways; Humans; Magnetic Resonance Imaging; Brain Mapping; Photic Stimulation; Pattern Recognition, Visual; Visual Perception; Adolescent; Adult; Middle Aged; Female; Male; Young Adult
Subjects: R Medicine > RC Internal medicine > RC0321 Neuroscience. Biological psychiatry. Neuropsychiatry
Divisions: Faculty of Science and Health
Faculty of Science and Health > Psychology, Department of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 14 Feb 2017 13:27
Last Modified: 06 Jan 2022 14:44

Actions (login required)

View Item View Item