Frequency domain synchrony between signals from the conventional disc electrode and the outer ring of the tripolar concentric ring electrode in human electroencephalogram data

For applications that may benefit from simultaneous recording of conventional electroencephalography (EEG) and tEEG, Laplacian EEG with tripolar concentric ring electrodes (TCREs), we proposed to use the signal from the outer ring of the TCRE as an emulation (eEEG) of EEG recorded using conventional disc electrodes. This allows recording EEG emulation from the exact same locations at the exact same time as the tEEG using a single recording system. In our previous work, time domain neuronal signal synchrony was assessed in phantom and human experiments suggesting the potential of eEEG as an emulation of EEG. In this paper, frequency domain neuronal signal synchrony was measured using coherence in human experiments further suggesting the potential of eEEG (C ≥ 0.98).