Michael Jackson may have been the only human to go two months without proper sleep, it has emerged.
A leading sleep expert has said he has never before heard of any person who has gone 60 days with Rapid Eye Movement (REM) sleep.
The revelations emerged during testimony by Dr. Charles Czeisler, a Harvard Medical School sleep expert, 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.
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 told the jury that the drug does not offer REM sleep and disrupts the normal sleep cycle.
But its 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 filled with anxiety. These are symptoms which Jackson was said to be suffering from in his final weeks.
'It would be like eating some sort of cellulose pellets instead of dinner,' he said. 'Your stomach would be full and you would not be hungry, but it would be zero calories and not fulfill any of your nutrition needs.'
Lawyers acting for AEG Live have said it was Jackson who chose and hired Murray. They say executives could not have known about the dangerous propofol treatments
The trial continues.