title: True checkerboard pattern reversal with light-emitting diodes.
abstract: The use of rectangular red light-emitting diodes permits construction of a true checkerboard pattern-reversal stimulator, which given evoked responses comparable in amplitude and wave form to those obtainable by a TV pattern generator. The device interfaces easily with commercial avergers and allows the incorporation of several features that may increase the sensitivity of visual evoked responses in screening for multiple sclerosis.
mesh_terms: D001921:Brain / Q000502:physiology*; D004569:Electroencephalography / Q000295:instrumentation; D005071:Evoked Potentials; D005556:Form Perception / Q000502:physiology*; D006801:Humans; D008027:Light; D010364:Pattern Recognition, Visual / Q000502:physiology*; D010775:Photic Stimulation