enta 3aref leh btenam? momken tefatkar ennak naym 3ashan ta3ban. aw momken 7ad alek en elnom kowayes leek. bas mahadesh 3aref bezabt leh wala ezay elnas btenam.

la7ad awael el1950s, mo3zam el3olama2 kano fakreen en elgesm wel mo5 beyerta7o wakt elnom. ba3den fe 3alem kan beyrakeb elnas wehoma naymen. la7az eno 5elal fatrat men 5 le 30 daka2ek, 3enen elnas elly nayma kanet bet3mel 7arakat sare3a, ka2enohom beyetfarago 3ala 7aga. samma el fatrat di REM sleep, ya3ni 7arakat el3en elsare3a. wel fatrat elly el3enen makanetsh betet7arak fiha sammaha non-REM sleep.

kol ma el3alem kan bey sa7y elnas 5elal REM sleep, kano beyshoofo a7lam wade7a. el qeyasat bayenet en nabdat elnas kanet betezid besora3a 5elal REM sleep. tanafoshom, darbat albohom, wel dam elly rayeh lel mo5 kaman zad. badal ma yekon wakt ra7a, REM sleep da wakt elgesm beyekon beyeshta8al gamed. el3olama2 lesa mesh 3arfeen elsabab wara keda. ba3d menhom ye3taked en REM sleep beyesa3ed fel ta3allom. elatfal beyokdo wakt keteer fel REM sleep. 3ashan keda, ba3d el3olama2 ye3takedo en REM sleep beyesa3ed elmo5 yekbar. we ba3d tany ye3taked en REM sleep da wakt elmo5 beyefady feeh zebalat elyom.

7aga wa7da kol el3olama2 motafkeen 3aleha en elnom darory. men 8er nom kafi, elnas bete3mel a5ta2. mo3zam 7awades el3arabeyat elkebeera bet7sal fel soba7 bedry, lamma elnas betkon 3andaha a3la mo3adal no3as.
eh elfekra elra2eseya fel maqal?
REM sleep beyesa3ed elmo5 yekbar. REM sleep etm morakbeto we tasgeelo bel3olama2. REM sleep da wakt lefady zebalat elyom. REM sleep da wakt nashet lamma elgesm beyekon beyeshta8al gamed.