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.
Production took place from February to April 2014 in Toronto and Los Angeles. The film had its premiere at 65th Berlin International Film Festival, at Berlinale Special Gala at the Zoo Palast on February 9, 2015. The film is set for a theatrical release in the United States on December 4, 2015.