Visual evoked potential estimation of visual activity with a Laplacian derivation.
Visual acuity was estimated with visual evoked potentials in 13 healthy subjects. A Laplacian derivation of 5 electrodes was used to improve the signal-to-noise ratio and to enhance striate cortical activity selectively. In 6 subjects, the Laplacian derivation gave a more reliable estimation of visual acuity than did a single midline derivation. In the other 7 subjects, the quality of both estimations was comparable.
Beers
A P
AP
The Netherlands Ophthalmic Research Institute, Amsterdam.
Riemslag
F C
FC
Spekreijse
H
H
D004566:Electrodes; D005074:Evoked Potentials, Visual / Q000502:physiology*; D006801:Humans; D008027:Light; D011601:Psychophysics; D014792:Visual Acuity / Q000502:physiology*