Magnetoencephalographic recording of steadystate visual evoked cortical activity
- 1 March 1997
- journal article
- Published by Springer Nature in Brain Topography
- Vol. 9 (3) , 163-168
- https://doi.org/10.1007/bf01190385
Abstract
Steady-state visual evoked magnetic fields (SSVEFs) were recorded in response to a flickering light source using a 37-channel magnetometer. The SSVEF had a sinusoidal waveform having the same fundamental frequency as the driving stimulus, which was either 6.0 Hz, 11.9 Hz, or 15.2 Hz. SSVEF topographies at each frequency had a dipoloar form over the posterior head that could well-modelled by single equivalent current dipoles. The best-fit dipoles were localized in posterior occipital cortex for the SSVEFs to 6.0 and 11.9 Hz stimuli and in more anterior and ventromedial occipital cortex for the 15.2 Hz SSVEP.Keywords
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