Spatial frequency representation in V2 and V4 of macaque monkey.
Elife
; 122023 01 06.
Article
em En
| MEDLINE
| ID: mdl-36607323
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 code 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 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.
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Base de dados:
MEDLINE
Assunto principal:
Córtex Visual
/
Macaca
Limite:
Animals
Idioma:
En
Ano de publicação:
2023
Tipo de documento:
Article