In the simplest terms, quantitative electroencephalography (qEEG) is the process in which the constant electrical activity of the brain is transformed into digital information and pictures, providing an explicit snapshot of the brain’s activity. It takes the derived data, and compares it to a database to determine the hyper- and hypoactivity within different brain regions, illustrating functionality. It’s highly reliability and test-retest scores are also evidence for its credibility. There are 4 main types of closed-head injuries that can be readily assessed following a concussion:
- Coupe contra-coupe injury: hitting one side of the brain, and bouncing back to hit the other side, injuring both areas.
- Contusions of the frontal-temporal gray matter: bruising.
- Shear forces on the gray and white matter: pulling and sliding of the brain cells.
- Rotational forces as in a whiplash: bruising and microscopic tears diffuse in multiple brain regions.
In addition to assessment of mild traumatic brain injuries (concussion), the qEEG can be used to look at the brain’s patterns to assess depression, anxiety, Attention Deficit Hyperactivity Disorder (ADHD), chronic pain, fibromyalgia, Post-Traumatic Stress Disorder (PTSD), and more. The qEEG (quantitative electroencephalograph) data is collected and statistically analyzed and compared to a database, providing a snapshot of how the areas of the brain are working and communicating in comparison to others. This process has allowed for the development of sub-programs such as the “Mild Traumatic Brain Injury Index or MTBI.” This index allows for the examination of the various areas of the brain most commonly concussed, and how these areas communicate. Results have been accepted as an objective measurement of brain injury by the courts in the United States.