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.
The electroencephalogram (EEG) is a recording of the electrical activity of the brain from the scalp. The recorded waveforms reflect the cortical electrical activity. Signal intensity: EEG activity is quite small, measured in microvolts (mV). Signal frequency: the main frequencies of the human EEG waves are: 1  Delta: has a frequency of 3 Hz or below. 2  Theta: has a frequency of 3.5 to 7.5 Hz and is classified as slow activity. 3  Alpha: has a frequency between 7.5 and 13 Hz.  Beta: beta activity is fast activity.