You don't sound stupid at all. I asked the very same question to someone 3 years ago.

Neurofeedback is a very complex therapy and I'll give you the abreviated description here. Basically, it is the process of training brainwaves that your brain produces. Through the process of operant conditioning - think of Pavlov's dog from high school psychology classes - you can train down unwanted brainwave patterns or train up wanted ones.

It is done by a qualified therapist or medical doctor (either one doesn't matter) who hooks your brain up to a computer via electrodes that are placed on your head and are connected to an amplifier. The computer reads your current brainwave status in real time and feeds this information to you visually, or auditorially. You then try, conscously and subconsciously, to inhibit or reward whatever brainwave parameter has been set for you via visual/auditory,tactile mechanisms. Unless you are using the LENS tecnique (in which case, consider yourself lucky) no signal is introduced into your brain at all.

And on the LENS note, if you are interested in this, try and find a therapist or doctor who specializes in the LENS. Traditional neurofeedback (described above) can be a very daunting task which takes about 40 sessions to complete. However, LENS is much easier and quicker.

If you want more detailed info, you can PM me or just google 'neurofeedback,' 'brain injury,' 'epilepsy/seizures' and you should get loads of info on it. You could also add LENS to that list, if interested.

Neurofeedback was originally used with much success (and still is today) for seizure disorders. It has also been used with a lot of success on TBI.