The 2-D brain maps depict the spatial distribution of the electrical power of Delta, Theta, Alpha, Beta, and High Beta brain frequencies, as measured from the scalp. The small dots on the maps represent the sensor (electrode) location, and the colours indicate how the individual brain activity compares to the norm. One standard deviation (SD) above the norm is yellow, two is orange, and three is red. Zero is the mean, and is coloured white. One SD below the norm is light blue, two SD below is darker blue, and three SD below is darkest blue.
The Coherence and Phase Lag deviations measured between specific electrode locations are displayed with blue and red lines. The thickness of the lines reflects the magnitude of the deviation from the norm, and their colour- if there are below, or above the norm. For instance, the thinnest blue line represents one SD below the norm and the thickest – up to three SD above the norm. Similarly, the thinnest red line represents one SD over the norm, and the thickest – three SD above the norm. No lines indicate activity within normal range.