i HAVE3 HAD 3 SLEEP STUDIES. i FOR THE DIAGNOSIS AND 2 FOR cpapRETITRATIONS. noNE OF THE SLEEP STUDIES WITH the EXCEPTION OF A 20 MINUTE PERIOD OF REM SLEEP EVER SHOWED ANY 3 OR 4 STAGES OF SLEEP. Is THIS ABNORMAL,AND IF SO WHAT DOES IT MEAN? moST OF THE TIME AT HOME WHEN i DREAM i USUSALLY WAKE UP IN THE MIDDLE OF THE DREAM. iM VERY CONFUSED ABOUT THIS. sTAGES 3 AND 4 ARE SUPPOSE TO BE RESTORATIVE SLEEP. wHAT DOES ALL THIS MEAN?