Another research technique that was used in determining the function of the MFB was microdialysis.[5] Reinforcing electrical stimulation of the MFB using this method has shown to cause a release in dopamine in the nucleus accumbens. Other microdialysis studies that have been performed have shown that the presence of natural reinforcers such as food, water, and a sex partner, have found to cause a release in dopamine in the nucleus accumbens. This shows that the electrical stimulation of the MFB causes a similar effect compared to natural reinforcers.