 Early studies of EEG-NF focused on alpha waves 8 - 12 Hz due to their link to feelings for calm12,13. Later, the method was broadened due to findings that showed that during a state of sleepiness the main frequency in brain activity is low theta waves 4-7 Hz14. The method of AT NF was since used in the research and in treatment of ADDADHD15 and was shown to be useful in the alleviation of symptoms of PTSD in two studies16,17. In a recent study EEG-NF was effective in reducing level of anxiety in patients after an acute coronary event18. 