The Quantitative EEG is used to assess brain functioning in terms of the frequencies the brain produces, affecting behaviour, emotions, and cognition.

Quantitative Electroencephalography (q EEG) is a diagnostic tool that provides a computerized and mathematical analysis of the electrical activity of the brain and is recorded by the EEG.  The different brain wave patterns are associated with and reveal important information about the functioning of the brain, such as stress and anxiety, impulsivity, cognitive flexibility, depression, emotional dysregulation, panic disorder, OCD, and learning disorders such as ADHD, and generally correlate with other psychometric test results

The EEG signals are converted into numerical data.
The frequency analyses identify the different frequency bands (e.g., delta, theta, alpha, beta, power.)

The q EEG can be compared to observing light through a prism. The detail is accentuated, which cannot be seen with the naked eye on a routine EEG recording, and provides information regarding brain functioning and cognition, as compared to a normative or reference database (Thatcher Neuro-Guide). The q EEG suggests treatment protocols and is a neurophysiological instrument that validates brain behaviour and is not performed for diagnostic purposes; however, results may be supportive of or correlate to pre-existing diagnosis or symptoms

The q EEG allows for:

1. Brain mapping: Visual representation of brain activity.
2. Neurofeedback training: Guided training to self-regulate brain function.
3. Clinical applications: Diagnosis, treatment planning, and monitoring of neurological and psychiatric conditions (e.g., ADHD, autism, depression, anxiety and other deficits).

How the electrical data is collected:

From the scalp to the computer screen

• The Different frequencies are recorded on the scalp, sent to the amplifier, and recorded on the computer.
• Converting the traces or frequency bands (delta, theta, alpha, beta, gamma) into the worldwide database will give us detailed information regarding the functioning of the brain.
• The q EEG further measures the power of each frequency band, connectivity or coherence of the brain, and the brain’s functional speed or phase.