Neurofeedback performed on subjects who had recovered from major depressive disorder resulted in an improvement in self-esteem, according to a study published in the journal Neuroimage: Clinical and summarized in EurekAlert, a publication of the American Association for the Advancement of Science. Their results were measured using fMRI scans and were a “proof of concept” experiment.  The study was important not just for the improvements in self-esteem that the researchers found, but because it shows difference in brain wiring as a result of neurofeedback training.

You can read the original study here and the EurekAlert summary here.

Keep in mind that fMRI is expensive and used in research. Actual neurofeedback practitioners almost never have fMRI at their disposal.