I ran across the following, and was wondering if "excessive slow wave activity" is something that's been documented in pwME/CFS, or if it's just this particular blogger's opinion. Persons with Attention Deficit/ Hyperactivity Disorder (ADD, ADHD), head injuries, stroke, epilepsy, and often chronic fatigue and fibromyalgia, are often observed with excessive slow wave activity (usually theta and sometimes excessive alpha). When an excessive amount of slow waves are present in the executive (frontal) parts of the brain, it becomes difficult to control attention, behaviour and/or emotions. Such persons generally have problems with concentration, memory, controlling their impulses and moods. They can't focus well and exhibit diminished intellectual activity.