title: Combined EEG and MEG recordings of visual 40 Hz responses to illusory triangles in human.
abstract: EEG and MEG were simultaneously recorded to study the visual gamma-band (30-70 Hz) responses. The electrical gamma-band response phase-locked to stimulus onset can be subdivided into a central component at 39 Hz and an occipital component at 36 Hz. A new high-frequency magnetic phase-locked response recorded over the occipital lobe is described. Its topography is complex and probably reflects the activity of multiple sources. Both electrical and magnetic high-frequency responses differ in topography from the low-frequency responses in the same latency range, suggesting that at least partially distinct sources are involved. The existence of a non-phase-locked 40 Hz component around 280 ms is confirmed in EEG data but is not detectable in MEG data.
authors.affiliation: Brain Signals and Processes Laboratory, INSERM U280, Lyon, France.
authors.forename: C
authors.initials: C
authors.lastname: Tallon-Baudry
authors.forename: O
authors.initials: O
authors.lastname: Bertrand
authors.forename: C
authors.initials: C
authors.lastname: Wienbruch
authors.forename: B
authors.initials: B
authors.lastname: Ross
authors.forename: C
authors.initials: C
authors.lastname: Pantev
mesh_terms: D000328:Adult; D004569:Electroencephalography; D005074:Evoked Potentials, Visual / Q000502:physiology*; D005260:Female; D006801:Humans; D015225:Magnetoencephalography; D008297:Male; D009903:Optical Illusions; D010775:Photic Stimulation; D011930:Reaction Time / Q000502:physiology