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.
Frankenstein, or The Modern Prometheus [1818 text], edited by James Rieger (New York: Bobbs-Merrill, 1974). Other: Posthumous Poems of Percy Bysshe Shelley, edited, with a preface and notes, by Mary Shelley (London: Printed for John & Henry L. Hunt, 1824).