Deprived: Michael Jackson may have been the only human  to go two months without sleeping properly

Michael Jackson went for 60 days without  sleep, making him the only person ever to have done so, a sleep expert has  claimed.

Charles Czeisler, a Harvard Medical School  sleep expert, said he has never heard of  any person who has gone 60 days with Rapid Eye Movement (REM) sleep as he  testified at the wrongful death trial of concert promoter AEG LIve.

Michael Jackson’s mother Katherine is suing  AEG Live, claiming it failed to properly investigate her son’s personal doctor  Conrad Murray and  missed warning signs about his failing health.

Murray was convicted of involuntary  manslaughter in 2011 after giving Jackson a lethal dose of the anesthetic  propofol.

Jackson’s mother argues AEG Live pressured  Dr. Murray to get her son to  rehearsals but ignored warning signs and failed to  get him help.

But AEG Live lawyers say Jackson chose and  hired Murray so their executives had no way of knowing about the propofol  treatments administered in his home.

As reported by CNN,  the jury was told by Dr  Czeisler that the 60 nights of propofol  infusions which Dr Murray said he gave Jackson to treat insomnia has never  before been undertaken.

Dr Czeisler, a sleep consultant to NASA and  the CIA, told the jury that the drug does not offer REM sleep and disrupts the  normal sleep cycle.

But it leaves those who take it refreshed and  feeling as though they have had a proper night’s sleep.

The doctor told the jury that the lack of REM  sleep could eventually have taken the singer’s life had he not have died when  did.

The jury was told that rats tested by  scientists died after five weeks of no REM sleep.

People who are deprived of REM sleep for long  periods become depressed, paranoid and anxious. They also lose their balance and  appetite, and can have slower physical and emotional reactions.

These  are symptoms which Jackson was said to  be suffering from in his final  weeks. His show’s producers reported that he  became thinner, paranoid and forgetful, and was heard talking to  himself.

Read more: DailyMail