BioSemi.nl

Hi Coen, Today we measured current in the skin conductance leads, in water (with CMS/DRL electrodes also). The current in the leads matches. So, we want to try your suggestion of using a CMS/DRL set with a pin on CMS and flat on DRL, shifting DRL location to the ear, which would let our experimenter...

Today we ran a subject with 128 EEG electrodes and skin conductance measurement. Both GSR lights were on. 16 Hz artifact appeared in electrode B2 and to a lesser degree in some of the other closest EEG electrodes surrounding DRL (located at its standard location on the scalp). The SC electrodes were...

Thanks for your response Coen. We had our system checked out by Lloyd for an unrelated issue just before the SC prob started. When we first encountered the SC 16 Hz leaking into EEG, we checked the SC electrodes/lead wires and found a wire was broken inside the insulation. This was repaired, and it ...

We are seeing the 16 Hz skin conductance signal contaminating EEG. It appears when the impedance of the skin conductance electrodes is higher than about 40K-ohm at the time of application. If the impedance falls below this value, the 16 Hz signal will disappear from EEG. This interference appearing ...