UNEQUAL REPRESENTATION OF CARDINAL AND OBLIQUE CONTOURS IN FERRET VISUAL-CORTEX

Authors
COPPOLA DM WHITE LE FITZPATRICK D PURVES D
Citation
Dm. Coppola et al., UNEQUAL REPRESENTATION OF CARDINAL AND OBLIQUE CONTOURS IN FERRET VISUAL-CORTEX, Proceedings of the National Academy of Sciences of the United Statesof America, 95(5), 1998, pp. 2621-2623
Citations number
31
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Proceedings of the National Academy of Sciences of the United Statesof America → ACNP
ISSN journal
00278424
Volume
95
Issue
5
Year of publication
1998
Pages
2621 - 2623
Database
ISI
SICI code
0027-8424(1998)95:5<2621:UROCAO>2.0.ZU;2-S
Abstract
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 pre ferentially activated by vertical and horizontal contours than by cont ours at oblique angles. This anisotropy may reflect the real-world pre valence of contours in the cardinal axes and could explain the greater sensitivity of many animals to vertical and horizontal stimuli.