The electroencephalogram or EEG evaluates the electrical activity produced by the brain. Brain waves are recorded by an EEG and show the electrical activity of the brain. The brain is an electrochemical organ that has 10 billion interconnected nerve cells which generate electrical activity. There are four categories of brainwaves. The categories range from the most active to the least active and are: beta, alpha, theta and delta
Each brain wave category refers to a different state of brain functioning. The EEG records the brain’s electrical pulsations and these pulsations are shown on a monitor or printed out in peaks and troughs. The height of the peak indicates amplitude while the distance between peaks indicates frequency.
Beta is the most active brain wave pattern and indicates that the brain is actively engaged and alert. You emit beta waves when you are angry or afraid or performing activities that require concentration.
