Abstract
Human electroretinograms and visually evoked cortical potentials to centrally viewed checkerboard patterns were recorded simultaneously.
With increasing testfields, small checks (4.6′) produce little or no amplitude increase in both the ERG and VECP while with large checks (46′) an amplitude increase is seen. With increasing check sizes an amplitude increase is seen in the ERG only for larger testfields (12° to 16°) while in the VECP there is an amplitude increase for check sizes of 4.6′ to 10′ for all testfields (5° to 16°). The curve relating VECP amplitude to check size shifts from a peak response at 10′ at smaller testfields (5° to 8°) to 46′ at bigger fields (12° to 16°).
Using annular testfields of 14° an increase of the blanked center from 7° to 13° diminishes preferably the responses to smaller check sizes both in the ERG and VECP.
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Groneberg, A. (1980). Simultaneously Recorded Retinal and Cortical Potentials Elicited by Checkerboard Stimuli. In: Schmöger, E., Kelsey, J.H. (eds) Visual Electrodiagnosis in Systemic Diseases. Documenta Ophthalmologica Proceeding Series, vol 23. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-9180-4_38
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DOI: https://doi.org/10.1007/978-94-009-9180-4_38
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