Excessive frontal Alpha activity is often associated with adult ADD/ADHD and depression. By closing our eyes and picturing something peaceful, we will quickly increase our Alpha brainwaves. Alpha waves will occur when our brains shift into a relaxed and disengaged or idle state. These brainwaves are associated with a state of relaxation. A presence of excessive Theta waves during a normal awake state could reflect problems with focus and attention, head injuries, and learning disorders.Ĭhildren and adults with ADHD will produce excessively lower frequency Theta waves. People in a deep meditative or hypnotic state will also have high frequency Theta waves. Higher range of Theta brainwaves are commonly found when we are engaging in complex, inwardly-focused problem solving – like doing math problems in our head. Interestingly, the lower range of Theta waves are present during the time between waking and sleep when we are feeling very calm, serene and in drifty states. Theta waves are present when we are daydreaming or fantasizing and are commonly associated with creativity and intuition. If seen in an awake state, theses waves may suggest issues related to depression, closed-head injury and learning disorders. They should not be excessive during an awake state.
These brain waves are the slowest brainwaves and are present primarily during sleep or when in a non-aroused state. The brainwave frequency bands used for clinical purposes are: For measurement, these brainwave frequencies are separated into five categories based on their repetitions per second (Hz) or cycles per second (cps). How Brainwaves are Classifiedīrainwave activity occurs on a continuum from slow to fast wave frequencies. A score of 0 represents the norm and is color-coded green, red shows excessive activity (positive deviation) and blue shows diminished activity (negative deviation). The Z-scores are placed on brain maps and color-coded according to the positive or negative deviation. The Z Scores range from -3 to +3 based on the number of standard deviations from normal. Results from the Quantitative EEG are presented as Z scores, which are standard deviations from a sample of brain map recordings from databases of healthy individuals of a similar age. Brainwaves occur at different frequencies depending on what the brain is doing.īy measuring these frequencies, using qEEG, it is possible to see where the brain is functioning less optimally. Your brain creates simple electricity through an electrochemical process measured in the form of brainwaves.