 Prospectively diagnosed PMDD women will be randomly assigned to either a real or sham EEG-NF protocol. During the training, patients will be instructed to Think Positively in order to actively manipulate brain areas that are related to positive experiences, while viewing a stream of various faces with different expressions. Following each facial image, feedback based on the alpha asymmetry score will be given to the patient regarding their ability to generate positive thoughts during the stream of faces. However, only the women within study group will receive accurate feedback. To obtain a neural and hormonal profile, patients will undergo simultaneous EEG-fMRI testing before and after training, and blood samples of hormone levels will be gathered. Comprehensive psychiatric and psychological assessment will be performed as an outcome measure. 