Meta-analysis of EEG biofeedback in treating epilepsy.
Based on this meta-analysis, EEG operant conditioning was found to produce a significant reduction on seizure frequency. This finding is especially noteworthy given the patient group, individuals who had been unable to control their seizures with medical treatment.
Studies reported an overall mean decreased seizure incidence following treatment and 64 out of 87 patients (74%) reported fewer weekly seizures in response to EEG biofeedback. Researchers concluded that neurofeedback is an effective treatment for epilepsy and it is completely safe, non invasive, painless and no side effect!
http://www.ncbi.nlm.nih.gov/pubmed/19715180