Does Cyton - Ultracortex Mark IV uses active referencing?
I'm completely new to BCI. So pls bear with me if the questions are basic.
I've read that some EEG systems send small currents to the electrodes - which could also pass through the head - such as for 'active referencing' - which as I understand is used to neutralize the potential difference between the electrode and the skin in order to get a stable electrode-skin impedance.
Does the Cyton - Ultracortex Mark IV uses such a technique? Or generally, does it send any current to the electrodes at any point in the EEG measurement process?