They can’t focus very well and exhibit diminished intellectual efficiency. More recently, a 5th brain wave has been discovered: the Gamma brain wave. There are many benefits if you learn how to reach these states. Delta is a state of deep restorative sleep. Theta is a deeper meditative state: the state between waking up and falling asleep. Such persons generally have problems with concentration, memory, controlling their impulses and moods, or with hyperactivity. Alpha is a state of deep relaxation or light meditation. When an excessive amount of slow waves are present in the executive (frontal) parts of the brain, it becomes difficult to control attention, behavior, and/or emotions. Persons with ADHD, learning disabilities, head injuries, stroke, Tourette’s syndrome, epilepsy, including chronic fatigue syndrome and fibromyalgia tend to have excessive slow waves (usually theta and sometimes excess alpha) present. If we are exceptionally anxious and tense, an excessively high frequency of beta brainwaves is often present. If we are inattentive to external things and our mind is wandering, there is more theta present. If we are becoming drowsy, there are more delta and slow theta brainwaves creeping in. Delta brainwaves will also occur when areas of the brain go “off line” to take up nourishment. Each of us, however, always has some degree of each of these brainwave bands present in different parts of our brain.
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