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Hello,

I am getting a duel channel EEG.. i need to know the most appropriate position to place the electrodes, so i could get an accurate signal to run a P300 scenario.

Some says Cz and Pz are ideal.. or O1 O2 and Cz (but since i have only 2 electrodes this is not possible)


So what does others think ? how can i resolve this?

Nb: i have not got the duel channel EEG to my hands as yet, it will be purchase soon, so don't tell me to try it out at various positions

Thanks, and hoping i will get a very quick and positive reply from your'l

A quick hunch from me would be to pick Pz and O1 or O2.

Gerv

Thanks for the reply gschalk,

i assume that we could get a strong P300 signal by only having electrodes in those 2 positions. am i right ?

and, has anyone in tried generating the P300 scenario using electrode positions Pz and O1 or O2 before? if so how was the results ?

nb: we are carrying out this project from a developing country so we have a very limited budget for this project. therefore i asked these sort of questions to verify before we purchase the device


Thanks, and hoping to hear from you soon

Hi,

1) You should definitely get something to work using signals from these two channels. Results will probably be a little worse than using an optimized 8-channel montage.

2) I do not quite understand why, if you have a 2-channel EEG device, you cannot place the electrodes where you want them.

3) Probably nobody has run BCI experiments with exactly these two locations before. You could download a P300 dataset from one of the BCI data competitions (just google bci data competition), and run offline analyses yourself. Again, I think these two locations should be fine.

Gerv

Thank you very much for the reply gschalk