The electrodes do not touch the head [resolved]
masteroforest
Russia
Good day!
The electrodes do not touch the head. We have a Cyton Daisy. There is a distance of 1-2 mm from the surface of the head to the electrode. How then comes the signal? We think that in this case the signal can be with a lot of interference (Wi-Fi, GSM, ...). Please, tell me how to use the kit in this case.
Best regards.
Comments
Hi Mastero,
Can you clarify? This is a question about Ultracortex headset? When electrodes do not contact the skin, they just pick up noise.
If you have reached the end of the adjustment range for the electrode holder, that means the frame size you have does not fit the person. Does the headset work with other head sizes?
Regards, WIlliam
Thank you for the answer, William.
No we don't have a Ultracortex. Our signal pickup kit, including headband and electrodes, is shown in the attached images.
The image shows that the electrodes are fixed at a distance of 1-2 mm from the head. I can’t understand how to take a signal. We must somehow compensate for this distance (1-2mm) in order to receive not a noise, but a signal. Perhaps something needs to be added to our kit?
Regards, Dmitriy
OK, sorry for the confusion. You are using,
https://shop.openbci.com/collections/frontpage/products/openbci-eeg-electrocap
Which states near the top that it is used with electrode gel,
https://shop.openbci.com/collections/frontpage/products/electrodegel
The gel is applied through each hole with a small blunt (not needle) syringe.
Regards, William
There are some online video tutorials on how to use the syringe with gel and cap.
https://www.google.com/search?q=electro-cap+tutorial
Now I understand: a distance of 1-2 mm between the electrodes and the surface of the head is compensated by electrode gel.
Thank you, William!
Best regards.