I do it but not with any special machines like an EEG machine, and so on. What I do is basically put my hand on my heart and slow my breathing and heart rate during panic attacks, relaxation techniques and so on and yes it helps me because instead of thinking about whatever it is that has triggered the panic I am focusing on something tangible - me and my body and what my body needs at that moment. finding a trigger does no good if I am passing out from a panic attack while looking for the trigger because I can't take care of the trigger -problem while I am dizzy and passed out so I turn on my relaxation music, put my hand on my belly or heart and consciously pay attention to my breathiing making it deeper and longer so that my body is getting more air, with more air going into my body my heart doesn't have to work so hard or fast. I also use it for pain control because I go through muscle spasms daily and so on associated with my physical health problems.

Biofeedback also known as neurofeedback can help any disorders just because it helps to control heart rate and breathing rate. its basically does the same thing as relaxation visualizations - relaxes the person and brings that person back into focusing on their physical bodies as a way to control many things such as anger, panic attacks, and how a person reacts to physical pain. Some people can actually decrease their breathing rate by taking in more oxygin and slowing their heart rate to the point where they have less bleeding during surgery and a faster recovery rate after surgery.

It is easy to learn hopw to do. all you need to do to learn biofeedback if you don't have the money for the machines it to practice various relaxation techniques such as breathing exercises and progressive relaxation and while you are doing them hold your hand on your belly and concentrate on making the breath go deeper and longer. You can also put your fingers on a pulse point and concentrate on your breathing and you will soon notice what types of breathing and activities make the heart go faster and slower.

This topic has come up a couple times here so you might be able to find more information by reading some of the past threads on this topic also.