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      Pattern Reversal Responses in Man and Cat: A Comparison

      research-article
      ,
      Ophthalmic Research
      S. Karger AG
      Contrast, Pattern reversal, Electroretinogram, Optic nerve recordings, Spatial interaction

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          Abstract

          In 42 enucleated and arterially perfused cat eyes, graded potentials were recorded from the retina (ERG) and from the optic nerve (ONR) in response to checkerboard stimuli, reversing at a low temporal frequency in a square wave mode. The ERG and ONR responses show an almost perfect duplication of the response to each reversal of the pattern and exhibit, in contrast to luminance responses, striking similarities in response characteristics such as amplitude, wave shape and time course. Furthermore, the amplitude versus check size plots coincide in both responses. In cat, pattern reversal responses can be recorded from 74 to 9 min of arc, correlating to the cat’s visual resolution. In man, almost identical responses can be recorded for the pattern ERG. However, in accordance with the difference in visual resolution in man and cat, a parallel shift for the human pattern reversal ERG response to higher spatial frequencies is observed.

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          Author and article information

          Journal
          ORE
          Ophthalmic Res
          10.1159/issn.0030-3747
          Ophthalmic Research
          S. Karger AG
          978-3-8055-3869-5
          978-3-318-00276-8
          0030-3747
          1423-0259
          1984
          1984
          04 December 2009
          : 16
          : 1-2
          : 67-72
          Affiliations
          Max-Planck-Institut für physiologische und klinische Forschung, Bad Nauheim, BRD
          Article
          265296 Ophthalmic Res 1984;16:67–72
          10.1159/000265296
          6728427
          9a70f3b1-e032-4526-be7b-025f751509ba
          © 1984 S. Karger AG, Basel

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          History
          Page count
          Pages: 6
          Categories
          Spatial Resolution, Determined by Electrical Potentials

          Vision sciences,Ophthalmology & Optometry,Pathology
          Pattern reversal,Contrast,Electroretinogram,Optic nerve recordings,Spatial interaction

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