Visual pattern recognition in the cerebral hemispheres : the role of spatial filtering

UNCG Author/Contributor (non-UNCG co-authors, if there are any, appear on document)
Fred H. Previc (Creator)
Institution
The University of North Carolina at Greensboro (UNCG )
Web Site: http://library.uncg.edu/
Advisor
F. H. Harter

Abstract: The differences between the left and right cerebral hemispheres in terms of visual pattern recognition were examined in the context of the spatial filtering model of visual perception. On the basis of a wide range of evidence, it was hypothesized that the right hemisphere is superior in the processing of low spatial frequency and/or high contrast information, and that this superiority may underlie its predominant role in "gestalt" perception. The left hemisphere, on the other hand, was hypothesized to be more highly involved in an analysis of high frequency and/or low contrast information contained in the visual environment. The spatial filtering capabilities of the two hemispheres were assessed by presenting square-wave gratings to the left and right visual fields, which project almost exclusively to the primary visual cortical areas of the contralateral hemispheres. Twenty-four right-handed adult male subjects were required to discriminate two different orientations of each of six gratings varying in fundamental spatial frequency and level of contrast.

Additional Information

Publication
Dissertation
Language: English
Date: 1982
Subjects
Pattern perception
Cerebral hemispheres
Visual perception

Email this document to