The gallbladder concentrates and stores bile as a pear-shaped sac which it can release to help digestion after a fatty meal.
Neurofeedback is a form of biofeedback that has gained popularity as a treatment for ADHD. Neurofeedback is also called neurotherapy and EEG biofeedback. Realtime information on the central nervous system is obtained via sensors on the scalp that relay either sound, vibration, or a visual display.