The thing is that we don’t use any cap, the electrodes are placed by hand. We use those positions to cover the lower head with inferior electrodes to record activity from the inferior surfaces of the brain. The reason to cover the lower head is that the application is epilepsy study (especially in patients with TLE). I’ve found the locations for all standard positions with a little search in the internet. But positions F12,F11,P11,P12 are not present in standard systems (like 10-20 or 10-10), they only are used to epilepsy study porposes and because of that I didn’t found them in the internet. That’s why I’m asking for help in this forum.
regards