A topographic study of oscillatory potentials in man

The purpose of this study was to evaluate the use of slow multifocal m-sequence stimulation in analyzing the topographic distribution and underlying mechanisms (including nonlinearities) of the retinal oscillatory potentials (OPs). In giving us access to the response topography and the nonlinear cha...

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Bibliographic Details
Published in:Visual neuroscience 1995-11, Vol.12 (6), p.1013-1025
Main Authors: Wu, Shuang, Sutter, Erich E.
Format: Article
Language:English
Subjects:
Adolescent
Adult
Biological and medical sciences
Electroretinogram
Electroretinography
Eye and associated structures. Visual pathways and centers. Vision
Female
Fundamental and applied biological sciences. Psychology
Humans
Male
Oscillatory potentials
Oscillometry
Photic Stimulation - methods
Retina - physiology
Retinal Rod Photoreceptor Cells - physiology
Retinal topography
Rod-cone interaction
Temporal nonlinearity
Vertebrates: nervous system and sense organs
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Summary:The purpose of this study was to evaluate the use of slow multifocal m-sequence stimulation in analyzing the topographic distribution and underlying mechanisms (including nonlinearities) of the retinal oscillatory potentials (OPs). In giving us access to the response topography and the nonlinear characteristics of the OP,, the m-sequence technique provides us with two important means for the identification and characterization of the signal sources. In this study, we analyzed the OPs into the first- and second-order components and investigated their topographies and luminance dependence. The distribution of both the first- and second-order OP components differed significantly from that of the nicker ERG investigated by Sutter and Tran (1992). At eccentricities and luminance levels favoring activity by both rods and cones, the second-order OPs were particularly prominent showing the most clear-defined and complex waveform The topographic distribution of the second-order OPs showed combined features of both rod and cone distributions On a strong rod-bleaching background the second-order OPs were eliminated and the first-order OPs showed a reduced amplitude and a shifted latency These results are consistent with the notion that the second-order component of the OPs is dominated by contributions from rod-cone interactions.
ISSN:0952-5238
1469-8714
DOI:10.1017/S0952523800006696