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

نویسندگان

  • Natanael A. dos Santos
  • Suellen M. Andrade
  • Bernardino Fernandez Calvo
چکیده

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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عنوان ژورنال:

دوره 7  شماره 

صفحات  -

تاریخ انتشار 2013