Skip to main content
×
Home

Consistent mapping of orientation preference across irregular functional domains in ferret visual cortex

  • LEONARD E. WHITE (a1) (a2), WILLIAM H. BOSKING (a2) and DAVID FITZPATRICK (a2)
    • Published online: 01 April 2001
Abstract

The mammalian visual cortex harbors a number of functional maps that represent distinct attributes of stimuli in the visual environment. How different functional maps are accommodated within the same cortical space, especially in species that show marked irregularities in one or more functional maps, remains poorly understood. We used optical imaging of intrinsic signals and electrophysiological techniques to investigate the organization of the maps of orientation preference, ocular dominance, and visual space in ferret. This species shows striking nonuniformity in the arrangement of ocular dominance domains and disruption of the mapping of visual space along the V1/V2 border. We asked whether these irregularities would be reflected in the organization of the map of orientation preference. The results show that orientation preference is mapped consistently within both V1 and V2, and across the interareal boundary, with no reflection of the irregularities in the other maps. These observations demonstrate the accommodation of multiple functional maps within the same cortical space without systematic geometrical relationships that necessarily constrain the organization of each representation. Furthermore, they imply that the structure of the map of orientation preference reflects the architecture and activity patterns of cortical circuits that are independent of other columnar systems established in layer 4.

Copyright
Corresponding author
Address correspondence and reprint requests to: Leonard E. White, Department of Community and Family Medicine, Division of Physical Therapy, Box 3965, Duke University Medical Center, Durham, NC 27710, USA. E-mail: white033@mcduke.edu
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Visual Neuroscience
  • ISSN: 0952-5238
  • EISSN: 1469-8714
  • URL: /core/journals/visual-neuroscience
Please enter your name
Please enter a valid email address
Who would you like to send this to? *
×

Keywords:

Metrics

Full text views

Total number of HTML views: 0
Total number of PDF views: 18 *
Loading metrics...

Abstract views

Total abstract views: 153 *
Loading metrics...

* Views captured on Cambridge Core between September 2016 - 18th November 2017. This data will be updated every 24 hours.