Magnetoencephalographic recording of steady-state visual evoked cortical activity.
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.
Müller
M M
MM
Department of Neurosciences, University of California, San Diego, La Jolla, USA. Matthias.M.Mueller@uni-konstanz.de
Teder
W
W
Hillyard
S A
SA
D000328:Adult; D005074:Evoked Potentials, Visual; D006706:Homeostasis; D006801:Humans; D008279:Magnetic Resonance Imaging; D015225:Magnetoencephalography; D014793:Visual Cortex / Q000033:anatomy & histology / Q000502:physiology*