Visual topography in primate V2: Multiple representation across functional stripes

Anna W. Roe, Daniel Y. Ts'o

Research output: Contribution to journalArticle

190 Scopus citations

Abstract

The second visual cortical area (V2) of the primate is composed of repeating thin, pale, and thick cytochrome oxidase stripes containing primarily color-selective, broadband oriented, and disparity-selective cells, respectively. We have now examined topography in V2 with respect to these functional subdivisions. Our data suggest that there are multiple, interleaved visual maps in V2, one for each of the color, orientation, and disparity domains. The same region of visual space is re-represented by each stripe within a stripe cycle, resulting in discontinuities or 'jumps back' in representation at stripe borders. Adjacent stripe cycles represent adjacent regions of space such that the visual map is continuous from one stripe to the next like stripe. Receptive field size and scatter are significantly larger for thin stripes than for thick stripes. Unexpectedly, our data suggest two types of pale stripes within each stripe cycle, one with scatter similar to thin stripes and another to thick stripes. Some evidence also suggests the presence of multiple maps within individual stripes in V2. Consistent with functional clustering within single stripes (Ts'o et al., 1990b), we have recorded re-representations and topographic discontinuities coincident with functional borders within single stripes. These results suggest that multiple and interleaved mapping may be a common organizational strategy for representing multiple functional domains within a single cortical area.

Original languageEnglish (US)
Pages (from-to)3689-3715
Number of pages27
JournalJournal of Neuroscience
Volume15
Issue number5 II
DOIs
StatePublished - May 1995

Keywords

  • cortical magnification
  • cortical maps
  • cytochrome oxidase stripes
  • hypercolumn
  • optical imaging
  • point image
  • point set
  • topography
  • visual area 2

ASJC Scopus subject areas

  • Neuroscience(all)

Fingerprint Dive into the research topics of 'Visual topography in primate V2: Multiple representation across functional stripes'. Together they form a unique fingerprint.

  • Cite this