where are the electrodes to be placed on the scalp during electroencephalography?

Question

What are the points of placment or hook-up of the electrodes when an EEG test is being performed?

Answer 1

http://www.immrama.org/eeg/electrode.html

Answer 2

Depending on the purpose for the EEG, implantable or invasive electrodes are occasionally used. Implantable electrodes include sphenoidal electrodes, which are fine wires inserted under the zygomatic arch, or cheekbone; and depth electrodes, which are surgically-implanted into the brain. The EEG electrodes are painless, and are used to measure the electrical activity in various regions of the brain.

Answer 3

Various places scattered over the scalp. The technician doing the test will know.