Unequal representation of cardinal and oblique contours in ferret visual cortex.

Journal Article (Journal Article)

We have measured the amount of cortical space activated by differently oriented gratings in 25 adult ferrets by optical imaging of intrinsic signal. On average, 7% more area of the exposed visual cortex was preferentially activated by vertical and horizontal contours than by contours at oblique angles. This anisotropy may reflect the real-world prevalence of contours in the cardinal axes and could explain the greater sensitivity of many animals to vertical and horizontal stimuli.

Full Text

Duke Authors

Cited Authors

  • Coppola, DM; White, LE; Fitzpatrick, D; Purves, D

Published Date

  • March 3, 1998

Published In

Volume / Issue

  • 95 / 5

Start / End Page

  • 2621 - 2623

PubMed ID

  • 9482936

Pubmed Central ID

  • PMC19437

International Standard Serial Number (ISSN)

  • 0027-8424

Digital Object Identifier (DOI)

  • 10.1073/pnas.95.5.2621


  • eng

Conference Location

  • United States