At the end of the procedure a flashing light may be placed nearby to see if this affects your brain activity. Sleep EEG or sleep-deprived EEG. A sleep EEG is carried out while you're asleep. It may be used if a routine EEG doesn't give enough information, or to test for sleep disorders.
This is all I could find on years...Prometheus was originally intended as a direct prequel to the 1979 science fiction horror film Alien, set approximately 30 years before the events depicted in the film. Alien supposedly takes place around 2122. Prometheus had a date of 2093 according to the intro.
The Alien Movies: Alien [Fox, 1979], Aliens [1986], Alien3 [1992], Alien Resurrection [1997], Prometheus [2012] NEWT: My mommy always said there were no monsters, no real ones; but there are..