Search found 5 matches

by Giuliano
Tue Mar 14, 2017 7:53 pm
Forum: EEG data analysis
Topic: DRL gel leak
Replies: 9
Views: 19406

Re: DRL gel leak

Sorry if I insist, I have read the other topic but there is still something not very clear to me: All the amplifier system that I have seen are based on an instrumental amplifier made by the classical configuration of 3 operational amplifier in which the input of the first stage are two signal from ...
by Giuliano
Tue Mar 14, 2017 5:07 pm
Forum: EEG data analysis
Topic: DRL gel leak
Replies: 9
Views: 19406

Re: DRL gel leak

Thank you for the suggestion. Tomorrow we will try with this configuration. In any case I was wondering if there is some technical specification about the circuitry of the amplifier. Because I am trying to understand how it works but I find it very difficult. I have understood that each channel is a...
by Giuliano
Mon Mar 13, 2017 7:58 pm
Forum: EEG data analysis
Topic: DRL gel leak
Replies: 9
Views: 19406

Re: DRL gel leak

The problem is that in our case the subject grasps two braille stimulator (with two different stimulation pattern) and probably a small amount of current flow from these devices to the DRL electrode. So this is not only a problem of power-line noise, but in P2 it is clearly visible the same pattern ...
by Giuliano
Fri Mar 10, 2017 11:33 am
Forum: EEG data analysis
Topic: DRL gel leak
Replies: 9
Views: 19406

Re: DRL gel leak

The problem is related to the position so seems to be due to gel bridge. As it often happen, we want to replace the DRL/CMS 'pin' cable with the new set with one 'pin' electrode (DRL) and a flat electrode (DRL). My question is if there is a recommend position for these electrodes. We want to measure...
by Giuliano
Tue Mar 07, 2017 3:37 pm
Forum: EEG data analysis
Topic: DRL gel leak
Replies: 9
Views: 19406

DRL gel leak

Hi, I am using Biosemi Active Two with 64 electrodes to record EEG during tactile stimulation of the index finger though a piezoelectric device. DRL and CMS electrodes are placed in the occipital zone. During the cap montage (and also during the subsequent analysis of the data) it is clearly visible...