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 most recent entry, the prequel Prometheus, is by far the most successful film in the franchise with a global take of $403 million at the box office worldwide and another film in the series, Alien: Covenant, is on the way in 2017 â the first of three movies that will eventually tie into the original Alien.