P300 electrode Help ...

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jacky1990
Posts: 9
Joined: 18 Aug 2010, 08:20

P300 electrode Help ...

Post by jacky1990 » 18 Oct 2010, 14:07

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 :D

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

gschalk
Posts: 615
Joined: 28 Jan 2003, 12:37

P300 electrodes

Post by gschalk » 18 Oct 2010, 17:43

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

Gerv

jacky1990
Posts: 9
Joined: 18 Aug 2010, 08:20

Post by jacky1990 » 19 Oct 2010, 05:00

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 :oops:


Thanks, and hoping to hear from you soon :D

gschalk
Posts: 615
Joined: 28 Jan 2003, 12:37

P300

Post by gschalk » 19 Oct 2010, 07:14

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

jacky1990
Posts: 9
Joined: 18 Aug 2010, 08:20

Post by jacky1990 » 19 Oct 2010, 14:46

Thank you very much for the reply gschalk :)

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