Alpha Alpha is primarily found in the rear of the brain, over sensory areas. Alpha is the bridge between conscious (beta) and subconscious (theta) states.  Alpha peaks should be around 10Hz.  Alpha would be expected to be higher in back and on the right (except that O1 is probably higher than O2).  The alpha frequency comes from the thalamic pacemaker (that’s what is meant by diffuse alpha projection system), and if you speed it up anywhere, you tend to speed […]