Surface electrodes need to be properly affixed to the skin over the head & body to lower impedance (electrical resistance), and thus specialized cleaning is necessary with mild abrasion to maximize skin contact & minimize resistance.
No needles are required and therefore the procedure is more of a nuisance than painful.
Paying meticulous attention to details is critical. To properly acquire information is time consuming, so one can expect to spend 2 – 4 hours to complete the study. The time required depends on the ease of defining clean waveforms and the complexity of the question(s) needing to be answered. The examination is done while reclining or lying down.
You have the right to stop this procedure at any time should you desire, although everything has and will be done to keep any discomfort to a minimum.
Staying calm and prepared to meditate or daydream will be helpful, but it is important NOT to fall asleep, as sleep blunts the ability to record high quality responses.