Spatial frequency representation in V2 and V4 of macaque monkey
- Zhejiang University, China
Abstract
Spatial frequency (SF) is an important attribute in the visual scene and is a defining feature of visual processing channels. However, there remain many unsolved questions about how extrastriate areas in primate visual cortex codes this fundamental information. Here, using intrinsic signal optical imaging in visual areas of V2 and V4 of macaque monkeys, we quantify the relationship between SF maps and (1) visual topography and (2) color and orientation maps. We find that in orientation regions, low to high SF is mapped orthogonally to orientation; in color regions, which are reported to contain orthogonal axes of color and lightness, low spatial frequencies (SFs) tend to be represented more frequently than high SFs. This supports a population-based SF fluctuation related to the 'color/orientation' organizations. We propose a generalized hypercolumn model across cortical areas, comprised of two orthogonal parameters with additional parameters.
Data availability
All data generated or analysed during this study are included in the manuscript and supporting file. All data used in the figures have been deposited at Open Science Framework (https://osf.io/agkr7/) and are publicly available as of the date of publication.
Article and author information
Author details
Funding
National Key Research and Development Program of China (2018YFA0701400)
- Anna Wang Roe
China Brain Initiative (2021ZD0200401)
- Anna Wang Roe
National Natural Science Foundation of China (31627802,81961128029,U20A20221)
- Anna Wang Roe
China Postdoctoral Science Foundation (2020M681829)
- Jia Ming Hu
National Natural Science Foundation of China (32100802)
- Jia Ming Hu
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Ethics
Animal experimentation: All procedures were performed in accordance with the National Institutes of Health Guidelines and were approved by the Zhejiang University Institutional Animal Care and Use Committee (Permit Number: ZJU20200022 and ZJU20200023).
Copyright
© 2023, Zhang et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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Spatial frequency representation in V2 and V4 of macaque monkey
eLife 12:e81794.
https://doi.org/10.7554/eLife.81794
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