 The proposed study aims to examine the clinical effectiveness of a novel therapeutic approach for treating emotional instability in PMDD. The investigators plan to use a clinical model of weekly brain-guided training i.e. NeuroFeedBack, NF to gain better self control of affect and its regulation. Feedback will be based on modulating pre-frontal EEG Alpha waves, a technique shown in prior studies to have a therapeutic effect in affective symptoms; however the brain circuitry which underlies such effects is largely unknown. By using simultaneous fMRI and EEG the investigators intend to unveil the neural correlates of response to such treatment and to provide new markers for clinical trajectory in PMDD. 