TERATOLOGICAL AND DEVELOPMENTAL STUDIES
Quantitative determination of thresholds of magnetophosphenes
Article first published online: 7 DEC 2012
Copyright 1979 by the American Geophysical Union.
Volume 14, Issue 6S, pages 199–200, November-December 1979
How to Cite
1979), Quantitative determination of thresholds of magnetophosphenes, Radio Sci., 14(6S), 199–200, doi:10.1029/RS014i06Sp00199., , and (
- Issue published online: 7 DEC 2012
- Article first published online: 7 DEC 2012
- Manuscript Received: 4 NOV 1977
ELF- and transient magnetic fields at moderate flux densities generate visual phenomena called magnetosphosphefles. The aims of this study were 1) to determine threshold values for the appearance of magnetophosphenes as a function of magnetic-field frequency in normal and colour-defective volunteers; 2) to study the dependence of the threshold values on the intensity of the background light and its spectral composition; and 3) to investigate the site in the visual system where the magnetophosphenes arise. Quantitative information was obtained about the threshold values of magnetophosphenes both in normal and in colour-defective volunteers. The phosphene threshold varied with the background light intensity and with its spectral composition.