Table from Ken Webber's Story

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         The human brain's operating frequency in hertz


          Hz
     -------------------------------------------------------
         00-04          DELTA    coma, deep sleep
         04-07          THETA    regular sleep R.E.M.
         07-08          ALPHA    normal waking consciousness
         08-13          BETA     very aware
         13-30                   manic phase sets in
     30-60 and above             approaching psychosis

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