The meaning of all this? Balance is the key. Our overall brain activity is a mix of all the frequencies at the same time, some in greater quantities and strength than others. So we don't ever produce only "one" brain wave type. They help describe the changes we see in brain activity during different kinds of activities. People tend to talk as if they were producing one type of brain wave (e.g., producing "alpha" for meditating).īut these aren't really "separate" brain waves - the categories are just for convenience. Are you wondering what kind of brain waves you produce? An interesting study has shown that advanced Tibetan meditators produce higher levels of gamma than non-meditators both before and during meditation. Gamma brain waves (39-100 hz) are involved in higher mental activity and consolidation of information. SMR activity seems to link brain and body functions. The Sensory motor rhythm (or SMR around 14 hz) was originally discovered to prevent seizure activity in cats. Since these original studies, other types of brainwaves have been identified and the traditional 4 have been subdivided. Beta waves (13-38 hz) occur when we are actively thinking, problem-solving, etc. Alpha waves (8-13 hz) occur when we are relaxed and calm
Theta waves (4-7 hz) are associated with sleep, deep relaxation (like hypnotic relaxation), and visualization Delta waves (below 4 hz) occur during sleep Researchers in the 1930's and 40's identified several different types of brain waves. The lower the number of Hz, the slower the brain activity or the slower the frequency of the activity. We also talk about the "frequency" of brain wave activity. Neurons communicate with each other by electrical changes.We can actually see these electrical changes in the form of brain waves as shown in an EEG (electroencephalogram).īrain waves are measured in cycles per second (Hertz Hz is the short form). Brain waves are generated by the building blocks of your brain - the individual cells called neurons.
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