JerryFreyang Posted January 7, 2017 Share Posted January 7, 2017 Does environment that having delta wave frequency able to help human to fall asleep faster? Another question will be is brain wave a transverse wave or longitudinal wave? Link to comment Share on other sites More sharing options...
iNow Posted January 7, 2017 Share Posted January 7, 2017 Perhaps this resource will help: https://web.mst.edu/~psyworld/sleep_stages.htm Link to comment Share on other sites More sharing options...
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