![]() ![]() Individual neurons or smaller networks, as well as the deeper regions of the brain, remain inaccessible to EEG, instead usually requiring invasive techniques.ĭespite the limitations, a lot can be gleaned from the large-scale readings of an EEG. The downside is that it is imprecise-it can only measure the cumulative activity of a large number of neurons over the surface of the brain, a signal that is further blurred by the skull and muscles between the brain and electrodes. ![]() This makes it a non-invasive technique, perfect for commercial devices to be used at home. To record this electrical activity, a number of electrodes are placed across the head. The EEG picks up on the electrical activity that results from swarms of neurons firing signals. ![]() Neural oscillations, as they’re often called, were discovered by Hans Berger in 1924, after he invented the electroencephalogram (EEG). This short guide will provide an overview of brain waves and explore some different methods for finding the frequencies you need when you need them. While there is still a lot to learn about brain waves, important research over the last few decades has revealed some of the essential roles they play, what happens when they go awry, and different techniques for taking greater control over them. These waves come from different locations and at different frequencies, depending on their purpose. When specific regions of the brain start talking with others, a synchronized signal appears, like ripples on a pond that travel across your cortex. At any given moment, there is a flurry of activity in your brain.īut that activity is not as disorganized and chaotic as it seems at first glance. ![]()
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