Hemi-field pattern visual evoked potentials: a comparison of display and analysis techniques.
Three methods for analyzing the spatial organization of visual evoked potentials were compared. Pattern reversal visual evoked potentials were obtained from a single subject under three viewing conditions: stimulation of the left, right, and both visual fields. The scalp distribution of the VEP to 1 deg checks was displayed using three recording and analysis techniques: a conventional horizontal occipital array of electrodes, topographic mapping, and 3-dimensional evoked potentials. All three techniques revealed "paradoxical" lateralization of P100. The relative merits of each technique are discussed.
Towle
V L
VL
Department of Neurology, University of Chicago, IL 60637.
Brigell
M
M
Spire
J P
JP
D001931:Brain Mapping; D004569:Electroencephalography; D005074:Evoked Potentials, Visual / Q000502:physiology*; D007839:Functional Laterality / Q000502:physiology; D006801:Humans; D010775:Photic Stimulation; D012535:Scalp / Q000502:physiology; D014794:Visual Fields / Q000502:physiology