Detection of spatial frequency in brain-damaged patients: influence of hemispheric asymmetries and hemineglect

Hemispheric specialization for spatial frequency processing was investigated by measuring the contrast sensitivity curves of sine-wave gratings in 30 left or right brain-damaged patients using different spatial frequencies compared with healthy participants. The results showed that left brain-damage...

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Published inFrontiers in human neuroscience Vol. 7; p. 92
Main Authors Dos Santos, Natanael A, Andrade, Suellen M, Fernandez Calvo, Bernardino
Format Journal Article
LanguageEnglish
Published Switzerland Frontiers Research Foundation 03.04.2013
Frontiers Media S.A
Subjects
Aphasia
Asymmetry
Brain injury
Brain research
Contrast Sensitivity
Frequency dependence
hemineglect
Hemispheric laterality
hemispheric specialization
Information processing
Neglect syndromes
Neuroscience
Neurosciences
spatial frequency
Specialization
Stroke
Visual discrimination
England
New York
hemispheric specialization
hemineglect
spatial frequency
stroke
contrast sensitivity
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Summary:Hemispheric specialization for spatial frequency processing was investigated by measuring the contrast sensitivity curves of sine-wave gratings in 30 left or right brain-damaged patients using different spatial frequencies compared with healthy participants. The results showed that left brain-damaged patients were selectively impaired in processing high frequencies, whereas right brain-damaged patients were more impaired in the processing low frequencies, regardless of the presence of visuo-spatial neglect. These visual processing results can be interpreted in terms of spatial frequency discrimination, with both hemispheres participating in this process in different ways.
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Reviewed by: Ariel Rokem, Stanford University, USA; Bradley Voytek, University of California, Berkeley, USA
Edited by: Srikantan S. Nagarajan, University of California, San Francisco, USA
ISSN:1662-5161
1662-5161
DOI:10.3389/fnhum.2013.00092