Barack and Michelle Obama did not adopt either of their two daughters. Perhaps you are thinking of Mr. Obama's 2008 opponent, John McCain-- he and his wife Cindy did adopt a lâ¦ittle girl from Bangladesh.
The test itself will take about 30-60 minutes. Placing the electrodes usually takes 20 minutes, but can take up to an hour, so the entire procedure may take about one to 2 hours. If you have an ambulatory EEG, brain activity is recorded for 24 hours or more.
Each complete cycle takes about an hour and a half. A group of researchers proposed in 1937 that the cycle be divided into 5 stages identifiable in the EEG record, labeled A through E. Now these stages are labeled 1 to 4, with the fifth being REM sleep. Some researchers refer to the wakefulness before sleep as stage 0.