Abstract
The averaged lambda wave elicited by saccadic eye movements across a checkerboard pattern has been reported to differ from checkerboard reversal evoked reponses, even when the electroencephalographic responses were corrected for the artefact caused by the movement of the dipole moment of the eye itself. Because of these differences it was suggested that the recording of the lambda wave might provide extra information in pathological circumstances. We performed experiments in which the parameters of the pattern (high contrast checkerboard pattern, 20′ checks, large field 72 × 72 degrees) shift across the retina were carefully adjusted. For instance, eye movements were made across an integer and odd number of checks in order to mimic the pattern reversal. Furthermore, the timing of the pattern movement in the pattern reversal condition was adjusted so as to simulate the saccadic eye movement. The results seem to suggest that the reported dissimilarities between pattern reversal and eye movement evoked responses can be accounted for by the small differences of the retinal shift in the two conditions.
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Riemslag, F.C.C., Van Der Heijde, G.L. & Van Dongen, M.M.M.M. Are eye movement evoked potentials different from pattern reversal evoked potentials?. Doc Ophthalmol 66, 279–289 (1987). https://doi.org/10.1007/BF00213656
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DOI: https://doi.org/10.1007/BF00213656