The human brain is more complex than your scientists suspect. They are busily mapping where certain functions occur, and how parts of the brain activate in syncronicity. They know that parts of the brain, near the stem, are older than, for instance, the forebrain, and that a human can survive remarkably well with only half a brain, as long as that half is either the right or left, intact. But what your scientists do not know is that beyond the old brain and the new, the subconscious and the conscious, the right and the left halves - there are yet more subdivisions of the human brain. Where it is known that the brain seems to specialize in activity that requires Beta frequency brain waves during wakefulness, and Alpha frequency waves during sleep or meditation, and Theta waves during rage, and Delta waves in coma - no one is quite sure why. We will tell you.
Where brain functions are localized close to the data stores, the chemical paths and links that constitute memory and the potential for thought, these functional mother lodes cannot be mined without the greased lightning that is the communication substrata. We are not speaking here of synaptic junctions, the ends of one brain cell's dendrites touching another. We are speaking here not of chemistry, but of a communication method not understood by your scientists, as it cannot be pressed between glass plates and peeked at under a microscope, or placed in a vial of chemicals to test its nature. It requires a living brain to express itself, and beyond the difference in frequency, its nature is unknown to your scientists.
Brain waves are but a symptom of the process, whereby the brain, as an organ, hums to itself. Think of the choir, where all warm up with the same musical scales - synchronicity. But the true musical potential is where the choir, open throated, strikes harmonious chords. So how does the brain hum and harmonize, and what does this have to do with communication? This music, as we have said, is not chemical but the result of chemical interactions, which result in what you may term a variation on electrical energy. Electrons are not the only particles involved in electrical current, which is much over simplified in man's theories. There are hundreds of sub-atomic particles that constitute electric current. The motion of this energy is in waves for the same reason a body of water has waves. For motion to occur at all there is pressure and release, then bumping and reaction. And how does this assist communication? Once the choir is humming, the voice of the soloist is complemented. She finds her note more surely when the basso is striking a chord with her. She swells to a high note more confidently when the altos are coming behind her, to cover her gasp when she runs out of breath. They are a team, the choir, and so are your brain's various frequencies. They all occur at once, but are noticeable at different times because of the dominance. Listen carefully, and you will hear the full choir.
The brain waves you are aware of differ because they are supporting different parts of your brain. Not this spot which when poked causes a sound to be heard, or this spot where when poked makes a finger twitch, but throughout the brain. They are different because they serve as a communication support for entirely different processes, which we will tell you about. The Delta waves, noticeable only during coma, are basic only to those parts of your brain which run the body. The basic processes, like digestion, heart beat, temperature control, blood pressure, and reaction to gross stimuli like a direct punch to the stomach or a match to the finger tip. Fish and worms have Delta, should anyone want to take note. Theta, evident during rage, is basic to the animal's reaction to dire threats, where blind rage is the only hope and sometimes a savior. Theta controls muscular control, focusing the resources of the body such as nutrients in the blood to the muscles and parts of the nervous system on alert. It is more than the chemical assist that comes from adrenaline. It directs the nervous system to forget all else, and concentrate on the fight. Poltergeist activity sometimes is related to Theta activity, and not by accident, as the mind is mentally as well as physically throwing things in order to survive.
Alpha is the brain wave belonging to that part of your brain that deals with scope, spiritual as well as physical. It pieces it all together, makes sense of it, or tries to, and listens to the subconscious, where the real story is always recorded. Meditation is done in Alpha, and hypnosis, and sleep, where dreams emerge. All this deep understanding of the nature of the world is resisted by yet another part of the brain, that supported by Beta waves, considered the brain waves of the wakeful and alert, intelligent human. Beta supports the physical existence of humans, by processing what the senses perceive and sharing this with the rest of the brain. Beta is grounded. It wants not to know of the deeper meaning, of connections, or what the spirit knows, it wants only to be here and now and can't be bothered with all that other nonsense. The Beta brain helps a creature get through the day, find enough to eat, and escape the flood or fire. It says, in essence, no time for day dreaming now, we've got survival to worry about. That's why the Alpha brain takes over at night, when the creature is safe, and has time for such nonsense as the riddles that the Universe presents.