June 1984
Volume 25, Issue 6
Articles  |   June 1984
Spatial adaptation of the cortical visual evoked potential of the cat.
Investigative Ophthalmology & Visual Science June 1984, Vol.25, 640-646. doi:
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      A B Bonds; Spatial adaptation of the cortical visual evoked potential of the cat.. Invest. Ophthalmol. Vis. Sci. 1984;25(6):640-646.

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      © ARVO (1962-2015); The Authors (2016-present)

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Adaptation that is spatially specific for the adapting pattern has been seen psychophysically in humans. This is indirect evidence for independent analyzers (putatively single units) that are specific for orientation and spatial frequency in the human visual system, but it is unclear how global adaptation characteristics may be related to single unit performance. Spatially specific adaptation was sought in the cat visual evoked potential (VEP), with a view towards relating this phenomenon with what we know of cat single units. Adaptation to sine-wave gratings results in a temporary loss of cat VEP amplitude, with induction and recovery similar to that seen in human psychophysical experiments. The amplitude loss was specific for both the spatial frequency and orientation of the adapting pattern. The bandwidth of adaptation was not unlike the average selectivity of a population of cat single units.


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