<qa>  What is the mean absolute power in squared microvolts per hertz?Electroencephalography EEG EEG before and after the acute phase of treatment will be used to examine mean absolute spectral power within 5 frequency bands. The mean absolute power in squared microvolts per hertz will then be computed within the following 5 frequency bands: delta 0.5-3.5 Hz, theta 3.5-7.5 Hz; alpha 7.5-12.5 Hz; beta 1 12.5-20.5 Hz, and beta 2 20.5-32.5 Hz. EEG activation spectral power will be assessed at rest eyes open and closed and during cognitive engagement in several tasks. 