Nerve cells in the brain are constantly creating very small electrical signals. Electroencephalogram (EEG) machines are used to record the electrical signals generated by nerve cells in the cerebral cortex. By recording these signals, we can determine the brainwaves, level of activity, and location of specific activity occurring within the brain.

Electrodes, which are usually small metal discs or sensors, are carefully placed along the head at regular intervals, using what is called the International 10-20 System of Electrode Placement. The subtle electrical signals occurring within the brain are picked up by the electrodes, and the electrodes detect the frequency and amplitude of those signals. The signals travel to the amplifier of the EEG, where they are then amplified and fed into a computer designated for EEG use.

Special EEG analysis software translates the amplified signals into visual readings such as a stripchart, histogram, compressed spectral array, hemispheric tool, or neuromap.

The image shown below depicts the EEG analysis software in action. Hovering your mouse over different areas in the image will cause the name of each type of display to appear. Clicking on an individual display will pop up a window with a more detailed description about that type of display.

EEG Images

EEG images are an excellent way to demonstrate the brainwave states and whole brain synchronization achieved through the use of our audio technology. We are in the process of formatting EEG images to upload to our web site in various formats. We will be updating this page frequently to include new links to various sets of images displaying EEG readings recorded while listeners used the Insight CD and Focus CDs.

Click here to view EEG/Brainwave Images:

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