Orientation mosaic in barn owl’s visual Wulst revealed by optical imaging: comparison with cat and monkey striate and extra-striate areas

Liu, Guang Bin and Pettigrew, John Douglas (2003) Orientation mosaic in barn owl’s visual Wulst revealed by optical imaging: comparison with cat and monkey striate and extra-striate areas. Brain Research, 961 (1). pp. 153-158. ISSN 0006-8993

Abstract

Using the technique of intrinsic signal optical imaging, orientation preference maps were obtained from theWulst of the barn owl in the area that represents central vision, and from the visual cortices (V1 and V2) of cat and marmoset monkey. Iso-orientation domains in barn owl’s visual Wulst were patch-like structures with an inter-patch distance of |0.9 mm, arranged in a pinwheel-like manner around singularity points. The size of the iso-orientation domains in barn owl was larger than those found in area V1, but comparable to those found in area V2, of cat and monkey. Superficial layers of the owl visual Wulst may be equivalent to extra-striate visual areas of primates and carnivores, as already suggested by electrophysiologists discussing the much increased radial dimensions of the Wulst compared with neocortex in mammals.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Author's version unavailable in electronic format.
Depositing User: Dr Guang Liu
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 11 Oct 2007 01:22
Last Modified: 02 Jul 2013 22:50
Uncontrolled Keywords: optical imaging; visual cortex; barn owl; cat; marmoset monkey
Fields of Research (FOR2008): 11 Medical and Health Sciences > 1109 Neurosciences > 110906 Sensory Systems
11 Medical and Health Sciences > 1109 Neurosciences > 110903 Central Nervous System
11 Medical and Health Sciences > 1113 Ophthalmology and Optometry > 111303 Vision Science
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970111 Expanding Knowledge in the Medical and Health Sciences
Identification Number or DOI: doi: 10.1016/S0006-8993(02)03747-2
URI: http://eprints.usq.edu.au/id/eprint/3225

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