Abstract：
:Pattern electroretinograms (PERGs) have been recorded in man and pigeon using phase reversing patterns. Studies were made in both species of the effect of grating spatial frequency, grating profile (sine or square) or the size of the squares of a checkerboard on the amplitude of the responses. The results obtained in the two species were similar. In general, the ratio of the amplitudes of the sine wave:square wave responses is that predicted by the Fourier fundamentals of the pattern, and is thus not determined by changes in local luminance or contrast as it is normally defined. Checks however gave larger responses than sine or square wave profile bars matched to the Fourier fundamental on the diagonal. The results are not explicable in terms of any single stimulus parameter and suggest that the PERG generator has a degree of center/surround organisation similar to retinal ganglion cells. It is however argued that, because of the known physiological properties, generators cannot be unequivocally localised by varying the stimulus or comparing retinal, cortical and perceptual response dynamics.
journal_name
Vision Resjournal_title
Vision researchauthors
Vaegan,Arden GBdoi
10.1016/0042-6989(87)90004-6subject
Has Abstractpub_date
1987-01-01 00:00:00pages
883-92issue
6eissn
0042-6989issn
1878-5646pii
0042-6989(87)90004-6journal_volume
27pub_type
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