Recording of Ultrafast (600-Hz) EEG Oscillations with Amplitudes in the Nanovolt Range during fMRI- Acquisition Periods
Ritter P, Freyer F, Anami K, Becker R, Villringer A, Curio G
Berlin Neuroimaging Center
Our data show that the synchronization between EEG and fMRI in combination with a ""steppingstone"" sequence allows recording of low-amplitude high-frequency EEG oscillations (HFOs) possibly reflecting cortical spiking activity during truly simultaneous fMRI acquisition. Amplitude modulations of the HFOs in the range of 50 nV induced by varying stimulus repetition rates were resolved.