Brainwave entrainment is a method to stimulate the brain into entering a specific state by using a pulsing sound, light, or electromagnetic field. The pulses elicit the brain’s ‘frequency following’ response, encouraging the brainwaves to align to the frequency of a given beat.
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Until quite recently, neurologists believed there were only four main categories of electrical activity in the human brain: Beta, Alpha, Theta, and Delta. But in the last few decades, specialists in the field of neuroacoustics, pushing their EEGs to the limits, have found new brain waves at frequencies that were previously thought impossible. The abilities conferred by those brainwaves are even more extraordinary. In this article we shall focus on the best known of these discoveries – the Gamma wave.
What Are Gamma Brain Waves and Why Are They So Special?
Gamma brain waves resonate at a frequency above the Beta wave that characterizes so much of our waking lives. Whereas Beta occupies a range from 13 – 30 Hertz (Hz), Gamma – if observed at all – is generally around 40 Hz. There does not appear to be a clear consensus on exactly where the upper limit of Gamma lies, but most resources place that point at around 70 Hz. Beyond that, we have the truly extraordinary states of HyperGamma (100 Hz) and Lambda (200 Hz), named by Dr. Jeffrey Thompson of the Center for Neuroacoustic Research.
We are used to describing the familiar Beta wave as shallow and weak, and often treat it with a certain degree of condescension, urging people to spend more time meditating in the more powerful states of Alpha and Theta. But Beta is essential for focus and concentration when interacting with the physical world and performing the myriad of complex tasks that confront us each day. Gamma waves, as one would expect, are even shallower than Beta waves, but they take our level of concentration and focus to an even higher level than Beta.
Neurologists have noted that Gamma waves are closely associated with a synthesis of senses, perceptions, and memories into a greater, holistic level of awareness and competence. In the Gamma state, we are able to perceive many senses at once, connect the present with the past, and combine separate ideas into larger constructs. This equates to a tremendously vivid, almost ecstatic state, bringing natural feelings of happiness and compassion in addition to the highest level of intelligence. In short, this could very well be the ultimate state of mind.
Are Gamma Brain Waves Too Good to be True?
Who wouldn’t want to enjoy supreme levels of competence, enhanced sensory perception, powerful learning ability and memory? Clearly, those who never come close to attaining these objectives could benefit from more Gamma waves, and it is likely that they will come to be used clinically in much the same way as Beta wave induction has been used to treat individuals with Attention-Deficit Disorder (ADD). And there can be no denying that the whole world could benefit from a lot more compassion, akin to that achieved by the “loving kindness” meditations of Tibetan monks.
But, just as too much time in Beta leads to mental and physical stress and imbalance, one would not want to overdo the even more frenetic Gamma wave. To be on the safe side, if you are going to target the Gamma frequency you should make absolutely sure that your mind and body are being thoroughly rejuvenated by the healing periods of dreamless sleep associated with the Delta wave.
Brainwave entrainment is a method to stimulate the brain into entering a specific state by using a pulsing sound, light, or electromagnetic field. The pulses elicit the brain’s ‘frequency following’ response, encouraging the brainwaves to align to the frequency of a given beat.
This ‘frequency following’ response of brainwave entrainment can be seen in action with those prone to epilepsy. If a strobe flashes at their seizure frequency, the brain will ‘entrain’ to the flashing light, resulting in a seizure.
On the positive side, this same mechanism is commonly used to induce many brainwave states; such as a trance, enhanced focus, relaxation, meditation or sleep induction. The brainwave entrainment effectively pushes the entire brain into a certain state.
Brainwave entrainment works for almost everyone. It is a great way to lead your mind into states that you might usually have difficulty reaching, allowing you to experience what those states feel like.
THE HYPE
There is a lot of marketing hype around brainwave entrainment. It is sold with promises of increasing IQ, promoting weight loss, ‘mind-tripping’, enhancing creativity, concentration, inducing spiritual states and more.
While these claims are not entirely true, they are not altogether false either. In practice, the claims are based on an overly-simplistic view of how the brain and the brainwaves function.
THE RUB
People are very seldom deficient in a certain brainwave type in all areas of their brain. Usually the distribution is much spottier, with an excess in one area and a deficiency in another.
We are all different, especially when it comes to the distribution of our brainwaves. Boosting a certain brainwave state may be beneficial for one person, and emotionally uncomfortable for another. Without knowing each person’s starting position, entrainment can be rather ‘hit and miss’.
If brainwave entrainment leaves you with unwanted side-effects (see below) or discomfort, you’re probably encouraging a range of brainwaves that are already excessive in some area of your brain. The way around this is to get a brain map to see what your brain’s strengths and weaknesses are, and see what (if any) brainwaves could use some encouragement.