Here is a person engaging in Neurofeedback. Placed on each ear lobe is a sensor, and another sensor is placed on the head at the site that is determined to be best for the outcome. She has her sensor placed on what we call Cz site.
Below is the computer program she is using to train her dys-regulated Theta barinwave. She is being rewarded by moving the beautiful picture on the right and receiving points for each time she reaches her treshold mark.